"Christy Morrissey says that over the past few years neonicotinoids have been used increasingly on crops in Western Canada and the chemical is making its way into wetlands, potentially having a devastating 'domino effect' on insects and the birds that rely on them." http://www.cbc.ca/news/canada/saskatchewan/pesticide-contaminating-prairie-wetlands-scientist-1.2482082
"Researchers, who have carried out a four-year review of the literature, say the evidence of damage [from neonicotinoid pesticides] is now 'conclusive'. The scientists say the threat to nature is the same as that once posed by the notorious chemical DDT." http://www.bbc.com/news/science-environment-27980344 GMO seeds are often coated with neonicotinoids.
Some nanoparticles (which are widely used in consumer products these days without having had to first undergo rigorous independent safety testing) may disrupt soil ecology and harm worms. http://informahealthcare.com/doi/abs/10.3109/17435390.2014.940403
ScienceDaily reports: "Nitrogen fertilizer applied to crops lingers in the soil and leaks out as nitrate for decades towards groundwater .... That means it could take longer than previously thought to reduce nitrate contamination in groundwater, including in aquifers that supply drinking water in North America and elsewhere." http://environmentalillnessnetwork.tumblr.com/post/66135834589/nitrogen-fertilizers-water-pollution GMO farms have polluted US soil with LOTS of nitrogen fertilizer!