Glyphosate - GBH

Published in Environment

GBH is the acronym for Grievous Bodily Harm, a criminal offence in UK law. It also stands for glyphosate-based herbicides...

In view of the increasing knowledge about the harm which glyphosate can cause, the shared acronym can seem appropriate. Concerns have been voiced by scientists and environmentalists over the safety of GBHs. Much has been written about their possible and known risks. Worries have been multiplying over the years since glyphosate was first introduced in 1974. In 2001, the Pesticide Action Network (UK) published a report highlighting the discrepancies between the manufacturer's claims for the herbicide and its real effects (1). Since then, much more has been observed in practice, and a lot of research has been done, all of it pointing in the same direction, that glyphosate is damaging to humans and the environment (2). In 2009 a report by the Pesticide Action Network Asia and the Pacific (PANAP) put forward a comprehensive review of the areas of concern, and suggested practical ways of improving the situation (3). In the last several years, scientists have been proving not only that glyphosate-based herbicides can be harmful, but also the mechanisms by which they cause harm.

For more details, please refer to our listing of scientific works in peer-reviewed journals relating to glyphosate and its risks. The list is updated regularly.

Approvals given on unscientific grounds

It is surprising how many supposed experts deny that there is any scientific evidence that herbicides are dangerous. On the contrary, there is plenty, published in a wide variety of respected peer-reviewed journals. I found no evidence that any of it had been properly considered when approval was sought for the pesticides. In fact, approval for glyphosate herbicide use has been given primarily on the basis of laboratory experiments on animals, experiments which were almost exclusively carried out by or on behalf of the agrochemical companies themselves, and which have mostly remained unpublished. There are hundreds of these unpublished studies.

Later reviews by responsible bodies, such as the 2004 World Health Organization document document produced in response to concerns about the high levels of glyphosate residues found in groundwater in Denmark and Greenland, and the report submitted to the EU by rapporteur state Germany in 2014 have largely focussed on whether the protocols for the studies carried out by the agrochemical companies were followed correctly. Reviewing those protocols has been done many times over the past few years. It evades the issues of concern. It is not a guarantee of pesticide safety, and does nothing towards reassuring the public that safety measures are at the forefront of official policies regarding these herbicides.

The effects of glyphosate-based herbicides vary according to specific conditions. In some places, glyphosate-related problems have shown up without room for doubt. This happened, for instance in Sri Lanka, which in 2014, became the first country to ban the sale of Roundup following publication of a report linking glyphosate to chronic kidney disease in rice-producing areas of the country (4). Disappointingly, the ban was not total. Following representations from the plantation lobby, which claimed to rely heavily on herbicides rather than using manual labour, the ban was restricted to those areas where chronic kidney disease was manifestly prevalent.

'Safe limits' in the human food chain?

Glyphosate residues have been found in many different fruits and vegetables, and have even been detected in harvested foodstuffs which were planted several months after the glyphosate application (5).

The authorities responsible for approving glyphosate and other pesticides have set so-called 'safe limits' for the amounts of the pesticides which can be present in the environment and the human food chain. Their assumption is that at these levels the pesticides will not cause harm. The defined limits are extrapolated from animal studies. Each time it turns out that the 'safe limits' have been exceeded, the amounts allowed are raised, apparently arbitrarily.

There are absolutely no scientific grounds for defining what might be a safe limit for human consumption. The only way they could be established realistically would be for all the animal studies to be repeated using humans as the guinea pigs. When new medicines are being researched, the process starts with animal studies in the laboratory, and then moves on to human trials before a medicine is passed for production. Why should poisons which are destined to permeate our soils, water and air, and to enter our food chain, be accepted without this vital second stage of research?

Of course, detailed human testing of the kind that has been done on animals would be unacceptable on ethical grounds. But by allowing the use of pesticides without human trials, everyone exposed to the pesticides, whether knowingly, unknowingly, willingly or unwillingly, has become the human guinea pig for their safety or otherwise. The results in practice show that a great deal of harm is being done.

Scientific evidence against pesticides ridiculed and/or suppressed

Energetic attempts have been made to discredit scientists who have systematically tried to show that pesticides pose risks to human health. Specially virulent attacks were aimed at Gilles-Eric Séralini and his team, who have vigorously rebutted the criticisms and continue to work on identifying the extent of the health risks involved. Under pressure from agrochemical lobbyists, a study they published was retracted by journal editors in 2013, despite the authors standing by their results. The study was republished in 2014.

Complex factors in pesticide use not taken into account

In practice, the effects of GBHs have been shown as more complex and more dangerous than those revealed in the laboratory experiments (1), (6), (7). The European Union regulators have come under fire for allegedly basing approval for glyphosate and Roundup on outdated, industry-sponsored tests while ignoring or suppressing scientific studies revealing the damage caused by Roundup and glyphosate, and for delaying the review of the herbicide, due in 2012, until 2015 (8). In 2013, the US Environmental Protection Agency (EPA) which issues the permits for pesticides, raised the levels of glyphosate permissible in oilseed and food crops - despite the fact that there is no proof that any level of herbicide is safe.

Empirical evidence

Scientific evidence takes a long time to accumulate. Practical experience revealed problems very many years ago. In the United Kingdom, for instance, medical specialists were commenting privately on the high incidence among farmers of myalgic encephalomyelitis (M.E., a chronically debilitating disease) back in the 1980s. There was speculation that this might be because of the heavy use of organophosphates, including glyphosate herbicides. In the 1990s, evidence was already accumulating about the harmful effects of glyphosate in practice (9).

My own first experience of glyphosate happened in around 2000, when I picked up a piece of litter from a flower bed in my street in London. I noticed that there was a stickiness on the leaves of the plants I touched, but thought nothing of it, until an hour later, when my hand swelled up and became excruciatingly painful. This hampered my afternoon's work with patients very badly. I contacted my local Council, who told me they had sprayed the flower bed with a herbicide which was "safe enough to drink": Roundup.

It is now known that ingesting Roundup can cause serious problems, including gastrointestinal corrosion, inability to swallow (dysphagia), epigastric pain, kidney and liver impairment, kidney failure, breathing difficulties, reduced consciousness, heart abnormalities and even death (10). These effects are known through observation of what happens when people ingest glyphosate, whether deliberately or unwittingly, or through environmental exposure. Obviously, no 'scientific studies' have been done on humans: it would be unacceptable to give humans poisons to eat or drink in order to see how much would do them harm, and how long it would take. Animal lovers would argue that it is equally unacceptable to perform these painful and destructive experiments on any living creature.

Glyphosate actions and reactions

Glyphosate kills weeds by inhibiting the shikimic acid pathway: shikimic acid is part of a process vital for plant survival. It was thought that this mechanism did not exist in humans (11). However, it is now recognized that the shikimate pathway exists in humans in the regulation of bacteria in the gut, and these gut bacteria are vital for the human immune system (12). Most people are now aware that it is the suppression of vital gut bacteria by the overuse of antibiotics which has led to the rise of the so-called 'superbugs'. Understanding that herbicides can also disrupt vital gut activity is an important step towards understanding how harmful herbicides can be to human health.

Glyphosate use proliferating

Glyphosate has been heavily promoted since its introduction in the 1970s by Agrochemical firm Monsanto, who still market it in the herbicide Roundup (Croatian Cidokor), which was banned in Europe in October 2016. The US patent for glyphosate expired in 2000, allowing other companies to produce GBHs, such as Syngenta, who make Touchdown (Croatian Ouragan). Monsanto had meanwhile broadened the market for GBHs by introducing Glyphosate-tolerant (Roundup Ready) genetically engineered crops in 1996. Roundup is now produced in several different formulations and increasing concentrations.

Independent review of glyphosate safety urgently needed

There is more than enough evidence to suggest that there is an urgent need to review the safety of glyphosate in particular and pesticides in general, without basing the review on material submitted by the agrochemical companies, and without allowing intervention by those companies.

1) the risks of glyphosate were underestimated when the product was launched as a herbicide;

2) largely unpublished studies submitted by the agrochemical companies were a poor scientific basis for asserting that glyphosate was 'safe';

3) the process of granting approval for glyphosate as a herbicide was therefore flawed;

4) there has been no long-term scientific study of the effects of glyphosate in the field under different conditions;

5) there is no scientific proof that any level of pesticide ingestion is safe for humans;

6) there is no scientific proof that pesticide use does not harm the environment or wildlife.

BAN PESTICIDES APPROVED UNDER THE CURRENT SYSTEM!

It is highly debatable whether chemical pesticides are needed at all. At the very least, a new, independent and more stringent approval system should be put in place. The use of pesticides which have been approved under the current system should be suspended pending objective assessments which take into account all the available evidence of possible harm to humans and the natural environment. Pesticide use in the environment should be reconsidered. Alternative methods of controlling unwanted vegetation and insects should be investigated and put to use.

SCIENTIFIC BASIS FOR WORRIES ABOUT GLYPHOSATE

Below is a brief summary of some of the scientific evidence relating to the main areas of concern. Most of the references lead to other papers and studies, and of course much more can be found by searching for 'Glyphosate problems' on the Internet, especially through the archives of relevant scientific journals.

GLYPHOSATE AND HUMAN HEALTH CONCERNS

Cancers. Clear laboratory and epidemiological evidence that glyphosate is potentially carcinogenic has been suppressed over many years (13). Glyphosate has been implicated in a number of cancers in humans, including non-Hodgkin lymphoma  (14, 15, 16) and multiple myeloma (17). Glyphosate has been shown to affect human oestrogen receptors, and to cause proliferation in human hormone-dependent breast cancer (18). Apart from consumers or potential consumers, there is particular concern for those who handle pesticides (19).

Birth defects and endocrine disruption. Birth defects have been found in humans (8 (20). Glyphosate has been shown to be an endocrine disruptor in human placenta cells (21, 22, 23). A study on three generations of aquatic snails showed that by the third generation glyphosate had adverse effects on the snails' reproduction and development, which could also have implications for humans (24). Glyphosate has been implicated in the malformations in piglets born in Denmark (25): these findings apparently contradict the assertion "Glyphosate does not cause mutations" in the Reregistration Eligibility Decision (RED) issued by the United States Environmental Protection Agency in September 1993 (26).

DNA damage. A study on human-derived buccal epithelial cells (taken from inside the mouth) showed that glyphosate and Roundup had cytotoxic and DNA-damaging properties (27).

Genotoxic effects. Glyphosate was shown to cause clastogenic and cytotoxic effects in bone marrow cells in mice, resulting in chromosomal damage (28).

Male infertility. In vitro it has been shown that glyphosate and Roundup cause damage to rats' testicular cells (29). Male reproductive functions in rats have been shown to be disrupted by low doses of Roundup (30).

Disruption of the gut bacteria. Glyphosate fed to rats is largely taken up in the gastrointestinal tract (31). It causes depletion of essential minerals and amino acids in dairy cows (32). In humans, glyphosate has been shown to disrupt bacteria in the gut (12).

Possible consequences of gut bacteria disruption include: 

     Crohn's disease (12)

     digestive problems (12)

     obesity (12)

     depression (12)

     Alzheimer's disease (12)

     Parkinson's disease (12) Glyphosate has been strongly linked to Parkinson's disease in humans (33)

     liver conditions (12)

     autism (12) (34)

     cancer (12)

     Coeliac disease (15)

     gluten intolerance (15)

Immune system disruption. A study of 258 dairy cows on 14 farms in Germany showed that animals with a high concentration of glyphosate in their urine revealed changes reflecting an adverse influence on their immune system. (32)

Damage to stomach, liver, kidney, brain, pancreas and spleen. A study on rats showed widespread damage to multiple organs from glyphosate, but also that zinc supplementation beforehand mitigated some of the effects (35).

Kidney damage (15) (4)

Thyroid disease (15)

Neurotoxicity. Roundup has been shown to cause oxidative damage and neurotoxicity in rats (36)


GLYPHOSATE AND THE ENVIRONMENT

Damage in soil and crops. Long-term studies have shown that glyphosate has many unpredicted and unwanted effects on the soil and plants. In Canada, glyphosate was found to be a factor in Fusarium infection (a highly damaging fungus) in wheat and barley (37). Field studies conducted over ten years from 1997-2007 on glyphosate-resistant soybean and maize showed that glyphosate application increased the frequency of root-colonizing Fusarium, interfered with microbial groups and functions, and could even serve as a nutrient for plant-destructive fungi (38). Glyphosate was found to have various negative effects, including toxicity to beneficial bacteria such as nitrogen-fixing rhizbia, and possible contamination of groundwater (5).

Damage to plants and trees. Glyphosate weakens plant defences against diseases, with glyphosate-treated crops showing increased disease severity (39). Glyphosate has been found to be damaging to plant growth (40). It can also cause serious damage to trees (41).

Weed resistance. Application of glyphosate-based herbicides has been shown to give rise to resistant weeds (42).

Earthworms. Laboratory tests have shown that glyphosate and another herbicide, 2,4-D, cause significant harm to earthworms (43).

Bees. The damage done to bee colonies, therefore pollination and honey production, through neonicotinoids and pyrethroids has been long established (44). A link between harm to bees and glyphosate has taken longer. A study on the effects of giving bees equivalent doses of glyphosate to those which they might get in the fields showed that their learning functions were impaired, giving rise to the possibility that traces of glyphosate brought into hives by forager bees could accumulate and have a damaging effect on colony performance (45).

In July 2014, s district judge in Yucatán, Mexico, ruled that "co-existence between honey production and GMO [Roundup-ready] soybeans is not possible". The judge's verdict was given on the basis of scientific evidence presented in Court, and resulted in Monsanto's permit for commercial planting of Roundup ready soybeans in Yucatán to be revoked. In March 2014, the Second District Court decreed: "The government secretariats of SAGARP [the Ministry of Agriculture] and SEMARNAT [the Ministry of the Environment] must guarantee that no genetically engineered (GE) soy will be grown in the state of Campeche starting from the 7th March 2014".

Insects. It has long been accepted that glyphosate-based herbicides could and probably would cause harm to insects and birds through damage to their food sources and habitats. This has been proved beyond doubt in the case of the Monarch butterfly (Danaus piexippus), which has shown a sharp decline in numbers which has been directly linked to the destruction of their milkweed breeding habitats (46, 47). 

 

Aquatic ecotoxicity : this document sets out the technical considerations for estimating the toxicity of glyphosate and glyphosate-based herbicides.

Water contamination. It was admitted in the 1993 EPA re-registration document that glyphosate has the potential to contaminate surface water (26, p 37). It has been shown to be capable of reaching groundwater (48). A Mexican study of 23 groundwater sites in agricultural and natural protected areas showed that glyphosate was detected in all the samples, including the natural protected areas where the researchers had not expected to find it. It was found in greater concentration during the dry season, which was as expected (49). An Austrian study showed significant residues of glyphosate and its metabolite AMPA in surface waters and waste water-treatment plants (50). Great concern has been expressed about the persistence of glyphosate in seawater, especially in relation to the Great Barrier Reef (51).

Fish 

Liver damage. A study has established that glyphosate causes moderate to severe liver damage in neotropical fish, Piaractus mesopotamicus, which "may affect the detoxification and/or tissue repair processes and contribute to fish death". (52).

DNA damage and oxidative stress have been found in freshwater fish Channa punctatus through exposure to sub-lethal doses of a glyphosate-based herbicide. (53).

Fish and aquatic invertebrates

Studies showed that under certain conditions a glyphosate-based herbicide could be toxic to aquatic invertebrates, including midge larvae and mayfly nymphs, and freshwater fish, including rainbow trout and bluegills. (54).

To sum up

The amount of glyphosate used across the world is enormous and apparently ever-increasing. From 1974 to 2014, over 1.6 billion kilograms of glyphosate as an active ingredient were applied in the United States, representing 19% of the estimated global use of glyphosate, which amounted to some 8.6 billion kilograms (55). Glyphosate's effects are all-pervasive, its damage impossible to calculate. 

Scientists are proving how and why glyphosate-based herbicides are damaging to human health and the environment. They should not have to do this. Clearly, the studies from which these herbicides were deemed to be safe were inadequate, to say the least. "Safe poison" is an oxymoron. There is every reason to ban glyphosate-based herbicides, in favour of farming and gardening practices which sustain good health in the soil, air and water on which we depend for our vital nutrition.

References

1) Buffin, D., Jewell, T., 2001.Health and environmental impacts of glyphosate: The implications of increased use of glyphosate in association with genetically modified crops. Pub. Friends of the Earth UK. 117 references

2) Krüger, M., Schledorn, P., Schrödl, W., Hoppe, H-W., Lutz, W., Shehata, A.A., 2014. Detection of Glyphosate Residues in Animals and Humans. Journal of Environmental and Anayltical Toxicology 4: 210. 30 references

3) Watts, M., 2009. Glyphosate.  Resport for the Pesticide Action Network Asia and the Pacific. 295 references

4) Jayasumana, C., Gunatilake, S., Senanayake, P., 2014. Glyphosate, Hard Water and Nephrotoxic Metals: Are They the Culprits Behind the Epidemic of Chronic Kidney Disease of Unknown Etiology in Sri Lanka? International Journal of Environmental Research and Public Health. 109 references

5) Cox, C., 1995. Glyphosate, Part 2: Human Exposure and Ecological Effects. Journal of Pesticide Reform 15 (4) 78 references

6) Julius, H., 2002.The Glyphosate threat 1: environmental issues. Pub. Friends of the Earth, available on The Rivermouth Action Group Inc. website. 98 references

7) Julius, H., 2002.The Glyphosate threat 2: health issues. Pub. Friends of the Earth, available on the Rivermouth Action Group Inc. website. 16 references

8) Antoniou, M., Ezz El-Din Mostafa Habib, M., Howard, C. V., Jennings, R.C., Leifert, C., Nodari, R.O., Robinson, C., Fagan, J.. June 2011. Roundup and birth defects. Is the public being kept in the dark?  Pub. Earth Open Source. 358 references

9) Pesticide Action Network, 1996. Glyphosate fact sheet. Pesticide News 33: 28-29. 11 references

10) Bradberry, S.M., Proudfoot, A.T., Vale, J.A., 2004. Glyphosate poisoning. Toxicological Reviews 23 (3) 159-167. 51 references 

11) Cotton, S., 2014 Soundbite molecules - glyphosate. Royal Society of Chemistry online magazine.

12) Samsel, Anthony, Seneff, Stephanie, 2013. Glyphosate's Suppression of Cytochrome P450 Enzymes and Amino Acid Biosynthesis by the Gut Microbiome: Pathways to Modern Diseases. Entropy 15: 1416-1463. 286 references

13) Ho, M.W., 2014. Glyphosate and Cancer. Institute of Science in Society Report 26.3.2014. 34 references

14) Eriksson, M., Hardell, L., Carlberg, M., Akerman, M., 2008. Pesticide exposure as risk factor for non-Hodgkin lymphoma including histopathological subgroup analysis. International Journal of Cancer 123: 1657-1663. 41 references

15) Samsel, Anthony & Seneff, Stephanie 2013. Glyphosate, pathways to Modern Diseases II: Celiac Sprue and Gluten Intolerance. Interdisciplinary Toxicology 6 (4) 159-184. 270 references
 
16) Schinasi, L., Leon, M.E., 2014. Non-Hodgkin Lymphoma and Occupational Exposure to Agricultural Pesticide Chemical Groups and Active Ingredients: A Systematic Review and Meta-Analysis. International Journal of Environmental Research and Public Health 11 (4): 4449-4527. 77 references

17) De Roos, A.J., Blair, A., Rusiecki, J.A., Hoppin, J.A., Svec, M., Dosemeci, M., Sandler, D.P., Alavanja, M.C., 2005. Cancer Incidence among Glyphosate-Exposed pesticide Applicators in the Agricultural Health study. Environmental Health Perspectives 113 (1) 49-54. 56 references

18) Thongprakalsang, S., Thiantanawat, A., Rangkadilok N., Suriyo, T., Satayavivad, J., 2013. Glyphosate induces human breast cancer cells growth via oestrogen receptors. Food & Chemical Toxicology 59: 129-136

19) Alavanja, M.C.R., Ross, M.K., Bonner, M.R., 2013. Increased Cancer Burden Among Pesticide Applicators and Others Due to Pesticide Exposure. CA: A Cancer Journal for Clinicians 63 (2): 120-142. 186 references

20) Garry, V.F., Harkins, M.E., Erickson, L.L., Long-Simpson, L.K., Holland, S.E., Burroughs, B.L., 2002. Birth Defects, Season of Conception, and Sex of Children Born to Pesticide Applicators Living in the Red River Valley of Minnesota, USA. Environmental Health Perspectives 110 (Suppl 3) 441-449. 69 references

21) Richard, S., Moslemi, S., Sipahular, H., Benachour, N., Séralini, G-E., 2005. Differential Effects of Glyphosate and Roundup on Human Placenta and Aromatase. Environmental Health Perspectives, 113 (6) 716-720. 38 references

22) Benachour, N., Sipahular, H., Moslemi, S., Gasnier, C., Travert, C., Séralini, G.E., 2007. Time- and dose-dependent effects of Roundup on Human embryonic and placental cells. Archives of Environmental Contamination and Toxicology 53 (1): 126-133. 42 references

23) Gasnier, C., Dumont, C., Benachour, N., Clair, E., Chagnon, M.C., Séralini, G.E. 2009. Glyphosate-based herbicides are toxic and endocrine disruptors in human cell lines. Toxicology 262 (3) : 184-191. 94 references

24) Tate, T.M., Spurlock, J.O., Christian, F.A. 1997. Effect of Glyphosate on the Development of Pseudosuccinea columella Snails. Archives of Environmental Contamination and Toxicology. 33 (3) 286-289

25) Kruger, M, Schrodl, Wieland, Pedersen, Ib, & Shehata, A. A., 2014. Detection of Glyphosate in Malformed Piglets. Journal of Environmental and Analytical Toxicology, 4:230 4 references

26) EPA Reregistration Decision: Glyphosate. EPA 738-R-93-014. September 1993, page 2. Bibliography: 281 entries, comprising 7 published papers, 228 unpublished papers submitted by Monsanto, 38 unpublished papers from other sources, 4 letters and 4 official statements / documents.

27) Koller, V.J., Fürhacker, M., Nersesyan, A., Mišik, M., Eisenbauer, M., Knasmueller, S., 2012. Cytotoxic and DNA-damaging properties of glyphosate and Roundup in human-derived buccal epithelial cells. Archives of Toxicology 86 (5): 805-813. 47 references

28) Prasad, S., Srivastava, S., Singh, M., Shukla, Y., 2009. Clastogenic Effects of Glyphosate in Bone Marrow Cells of Swiss Albino Mice. Journal of Toxicology (2009) 308985. 39 references

29) Clair, E., Mesnage, R., Travert, C., Séralini, G.E., 2012. A glyphosate-based herbicide induces apoptosis in mature rat cells in vitro, and testosterone decrease at lower levels. Toxicology in vitro 26: 269-279. 61 references

30) de Liz Oliveira Cavalli, V.L., Cattani, D., Heinz Rieg, C.E., Pierozan, P., Zanatta, L., Parisotto, E.B., Filho D.W.., Mena Barreto Silva, F.R., Pessoa-Pureur, R., Zamoner, A., 2013. Roundup disrupts male reproductive functions by triggering calcium-mediated cell death in rat testis and Sertoli cells. Free Radical Biology and Medicine 65: 335-346. 80 references

31) Brewster, D.W., Warren, J.,Hopkins, W.E., 1991. Metabolism of glyphosate in Sprague-Dawley rats: Tissue distribution, identification, and quantification of glyphosate-derived materials following a single oral dose. Fundamental and Applied Toxicology 17: 43-51 

32) Schrödl, W., Krüger, S., Konstantinova-Müller, T., Shehata, A., Rulff, R., Krüger, M., 2014. Possible Effects of Glyphosate on Mucorales Abundance in the Rumen of Dairy Cows in Germany. Current Microbiology 69 (6) 817-823. 40 references 

33) Barbosa E.R., da Costa, L., Bacheschi, L.A., Scaff, M., Leite, C.C., 2001. Parkinsonism after glycine-derivate exposure. Movement Disorders 16 (3): 565-568

34) de Cock, M., Maas, Y.G., van de Bor, M., 2012. Does perinatal exposure to endocrine disruptors induce autism spectrum and attention deficit hyperactivity disorders? Review. Acta Paediatrica 101 (8): 811-888. 55 references

35) Tizhe, E.V., Onyebuche, I.I., George, B.D.J., Ambali, S.F., Shallangwa, J.M., 2014. Influence of zinc supplementation on histopathological changes in the stomach, liver, kidney, brain, pancreas and spleen during subchronic exposure of Wistar rats to glyphosate. Comparative Clinical Pathology 23 (5): 1535-1543 (published online October 2013) 32 references

36) Cattani, D., de Liz Oliveira Cavalli V.L., Rieg, C.E.H., Dominques, J.T., Dal-Cim, T., Tasca, C.I., Barreto Silva, F.R.M., Zamoner, A., 2014. Mechanisms underlying the neurotoxicity induced by glyphosate-based herbicide in immature rat hippocampus: involvement of glutamate excitoxicity. Toxicology 320 (5): 34-45. 

37) Fernandez, M.R., Zentner, R.P., Basnyat, P., Gehl, D., Selles, F., Huber, D., 2009. Glyphosate associations with cereal diseases caused by Fusarium spp. in the Canadian prairies. European Journal of Agronomy 31: 133-143. 63 references 

38) Kremer, R.J., Means, N.E., 2009. Glyphosate and glyphosate-resistant crop interactions with rhizosphere microorganisms. European Journal of Agronomy 31 (3) 153-161. 

39) Johal, G.S., Huber, D.M., 2009. Glyphosate effects on diseases of plants. European Journal of Agronomy 31 (3): 144-152. 

40) Bott, S., Tesfamariam, T., Candan, H., Cakmak, I., Römheld, V., Neumann, G., 2008. Glyphosate-induced impairment of plant growth and micronutrient status in glyphosate-resistant soybean (Plant and Soil 312 (1-2): 185-194

41) Feucht, J.R. 1988. Herbicide injuries to trees - symptoms and solutions. Journal of Arboriculture 14 (9) 215-219 (page 217). 8 references

42) Hawkes, T.R., Lorraine-Colwill, D.F., Williams, P.H., Warner, S.A.J., Sutton, P.B., Powles, S.B., Preston, C., 1999. Resistance to Glyphosate in a Population of Lolium Rigidum. Plant Biotechnology and in vitro Biology in the 21st Century. Current Plant Science and Biotechnology in Agriculture. 36: 491-494 10 references

43) Correia, F.V., Moreira, J.C., 2010. Effects of Glyphosate and 2,4-D on Earthworms (Eisenia foetida) in Laboratory Tests. Bulletin of Environmental Contamination and Toxicology 85 (3): 264-268

44) Gill, R.J., Ramos-Rodriguez, O., Raine, N.E., 2012 Combined pesticide exposure severely affects individual- and colony-level traits in bees. Nature 491: 105-108. 40 references, 20 supplementary references

45) Herbert, L.T., Vázquez, D.E., Arenas, A., Farina, W.M., 2014. Effects of field-realistic doses of glyphosate on honeybee appetite behaviour. Journal of Experimental Biology 217: 3457-3464

46) Sirinathsinghji, E., 2011. Glyphosate and Monarch Butterfly Decline. Report for the Institute of Scientists in Society, 19/9/2011.

47) Pleasants, J.M., Oberhauser, K.S., 2012. Milkweed loss  in agricultural fields because of herbicide use: effect on the monarch butterfly population. Insect Conservation and Diversity 6 (2): 135-144. 33 references

48) Sanchis,J., Kantiani, L., Llorca, M., Rubio, F., Ginebreda, A., Fraile, J., Garrido, T., Farré, M., 2012. Determination of glyphosate in groundwater samples using an ultrasensitive immunoassay and confirmation by on-line solid-phase extraction followed by liquid chromatography coupled to tandem mass spectrometry. Analytical and Bioanalytical Chemistry 402 (7) 2336-2345. 25 references

49) Ruiz-Toledo, J., Castro, R., Rivéro-Perez, N., Bello-Mendoza, R., Sánchez, D., 2014. Occurrence of Glyphosate in Water Bodies Derived from Intensive Agriculture in a Tropical Region of Southern Mexico. Bulletin of Envirnomental Contamination and Toxicology 93 (3): 289-293. 47 references

50) Popp, M., Hann, S., Mentler, A., Fuerhacker, M., Stingeder, G., Koellensperger, G., 2008. Determination of glyphosate and AMPA in surface and waste water using high-performance ion chromatography coupled to inductively coupled plasma dynamic reaction celll  mass spectrometry (HPIC-ICP-DRC-MS). Analytical and Bioanalytical Chemistry 391 (2): 695-699. 16 references

51) Mercurio, P., Flores, F., Mueller, J.F., Carter, S., Negri, A.P., 2014. Glyphosate persistence in seawater. Marine Pollution Bulletin 85 (2) 385-390. 53 references

52) Shiogiri, N.S., Paulino, M.G., Carraschi, S.P., Baraldi, F.G., da Cruz, C.,Fernandes, M.N., 2012. Acute exposure of a glyphosate-herbicide affects the gills and liver of the Neotropical fish, Piaractus mesopotamicus. Environmental Toxicology and Pharmacology 34 (2) 388-396

53) Nwani, C.D., Nagpure, N.S., Kumar, R., Kushwaha, B., Lakra, W.S., 2013. DNA damage and oxidative stress modulatory effects of glyphosate-based herbicide in freshwater fish Channa punctatus. environmental Toxicology and Pharmacology 36 (2) 539-547. 15 references

54) Folmar, L.C., Sanders, H.O., Julin, A.M. 1979. Toxicity of the herbicide glyphosate and several of its formulations to fish and aquatic invertebrates. Archives of Environmental Contamination and Toxicology 8 (3) 269-278. 9 references

55) Benbrook, C.M. 2016. Trends in glyphosate herbicide use in the United States and globally. Environmental Sciences Europe 28 Article no. 3. 89 references

© Vivian Grisogono 2014, updated 2019. 

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  • Government plan to educate owners and encourage fines not enough to effectively tackle air pollution

    Study links air pollution to mental ill-health

    Politicians and campaigners have called for an urgent review of wood-burning stoves, which cause large amounts of pollution in urban areas.

    The calls follow the admission by the environment secretary that the government had set weaker air pollution targets than it would like. The admission came as she announced a new environmental plan for England that held back from banning wood-burning stoves and settled instead for “educating” people on their use.

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  • Co-author of paper says results have implications for anyone who has to think hard in polluted areas

    Chess experts make more mistakes when air pollution is high, a study has found.

    Experts used computer models to analyse the quality of games played and found that with a modest increase in fine particulate matter, the probability that chess players would make an error increased by 2.1 percentage points, and the magnitude of those errors increased by 10.8%.

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  • National Trust project shows family home of ‘nature’s engineers’ and how they have improved the environment for other wildlife

    They can be seen chugging around their watery domain like small furry tugboats, gnawing away at saplings or nuzzling up to each other. The sound of babbling water and birdsong provides a pleasing soundtrack.

    A new online tour was launched on Thursday of an enclosure on the Holnicote estate in Somerset that is home to a family of five beavers. In what is billed as the first of its kind, the tour allows viewers to navigate through the 2.7-acre Exmoor enclosure where two adult beavers and their three offspring live and work.

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  • Retailer and green groups warn of ‘high environmental cost’ of fish aggregating devices to tuna stocks and other endangered marine life

    The EU is under pressure to significantly restrict its huge fleet of fishing vessels from using “fish aggregating devices” that make it easier to catch huge numbers of fish and contribute further to overfishing.

    A letter signed by Marks & Spencer and more than 100 environmental groups, including the International Pole and Line Foundation, warns EU officials that the devices (FADs) are one of the main contributors to overfishing of yellowfin tuna in the Indian Ocean, because they catch high numbers of juveniles.

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  • The energy industry is turning waste from dairy farms into renewable natural gas – but will it actually reduce emissions?

    On an early August afternoon at Pinnacle Dairy, a farm located near the middle of California’s long Central Valley, 1,300 Jersey cows idle in the shade of open-air barns. Above them whir fans the size of satellites, circulating a breeze as the temperature pushes 100F (38C). Underfoot, a wet layer of feces emits a thick stench that hangs in the air. Just a tad unpleasant, the smell represents a potential goldmine.

    The energy industry is transforming mounds of manure into a lucrative “carbon negative fuel” capable of powering everything from municipal buses to cargo trucks. To do so, it’s turning to dairy farms, which offer a reliable, long-term supply of the material. Pinnacle is just one of hundreds across the state that have recently sold the rights to their manure to energy producers.

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  • Researchers find long-term exposure to even relatively low levels raises risk of depression and anxiety

    Long-term exposure to even comparatively low levels of air pollution could cause depression and anxiety, according to a study exploring the links between air quality and mental ill-health.

    Tracking the incidence of depression and anxiety in almost 500,000 UK adults over 11 years, researchers found that those living in areas with higher pollution were more likely to suffer episodes, even when air quality was within official limits.

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  • Government accepts Liberal Democrat amendment to UK infrastructure bank bill

    Taxpayer money may no longer be invested in water companies that fail to produce adequate plans to stop sewage discharges, after the government accepted a Liberal Democrat amendment.

    The change to the UK infrastructure bank bill means that once it becomes law, tax receipts will only be able to fund water companies if they produce a costed and timed plan for ending sewage spills into waterways.

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  • Council election could have national implications if Greens snatch ward from Lib Dems

    The issues that have been raised on the doorstep during the campaign have tended to be local ones – from concerns over new housing developments to the state of the pavements and plans to increase fees paid by people who live on boats in the harbour.

    But a council byelection taking place at Bristol city council on Thursday may have national implications should the Green party manage to pinch the ward from the Lib Dems.

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  • Study suggests tool could be used to reduce energy needs for heating and cooling office buildings

    Every year we shift our clocks forward in the spring, and backwards in the autumn. Originally daylight saving was introduced to save energy; reducing the number of hours that the lights had to be on in office buildings. But as climate changes, can daylight saving be used to reduce the energy demand for heating and cooling our office spaces?

    To answer this question researchers simulated the heating and cooling demands of office buildings for 15 different cities across the United States and analysed the impact that daylight saving could have until the year 2050 under different climate scenarios. Under current climate conditions daylight saving reduced cooling demand by up to 5.9%, but increased heating demand by 4.4%. As we head into a warmer future they found that daylight saving could reduce cooling demand by up to 5.4%, while increasing heating demand by 3.2%. In both cases daylight saving results in a net decrease in energy used.

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  • Bossington, Somerset: Whether by human or nature’s hand, the riparian landscape here is being reshaped

    The January storms that boomed over Exmoor shed so much rain that the River Barle washed away a section of the ancient stone clapper bridge at Tarr Steps. And at Bossington Beach near Porlock, the combined forces of the usually mild Horner Water and River Aller blasted through the pebble bank, carving a deep, curving route roaring red-brown into the sea.

    It will be weeks until the huge rock slabs at Tarr Steps are recovered and replaced, but the breach at Bossington is already rapidly repairing itself as the tides re-sweep the shingle. Breaks such as this often occur because the beach is changing shape – it is being gradually thinned and lengthened by the sea’s swash and drift.

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