How and why Monsanto has "devastated" agriculture.
Monsanto got approval to sell its soybeans genetically engineered for its Roundup herbicide by selling the USDA that glyphosate (the main poison in Monsanto's Roundup herbicide) by saying that it's a low risk for weed resistance.
In other words, they got approval based on the idea that weeds wouldn't evolve the ability to survive roundup, and thereby become Super Weeds.
Since then, some 20 weed species have evolved resistance to glyphosate and Roundup. http://www.reuters.com/article/2011/09/19/us-monsanto-superweeds-idUSTRE78I4BA20110919
Now, in order to kill these Super Weeds, farmers are using expensive, dangerous and time-consuming weed killing methods. http://www.slate.com/blogs/future_tense/2012/03/12/monsanto_and_roundup_resistant_weeds.html
Monsanto's genetically modified corn, which manufactures its own poison, has had the same effect on the bugs it's designed to kill -- forced them to evolve resistance to the poison. Plus, it's probably toxic to humans. http://www.businessweek.com/news/2011-12-06/monsanto-corn-may-be-failing-to-kill-bugs-in-4-states-epa-says.html
Monsanto's GMO soy and corn is added to the fast majority of processed foods in the supermarket and junk food at fast food restaurants. You'd never know it, though, as Monsanto's shills in Congress refused to require the labeling of GMO food. http://opinionator.blogs.nytimes.com/2011/02/15/why-arent-g-m-o-foods-labeled/
Agriculture isn't the only thing Monsanto's Roundup is "devastating." They're also devastating the environment and human health. http://thetruthpursuit.com/front-page/monsantos-roundup-ravaging-butterfly-populations-study-shows/11100http://www.dailytech.com/Monsanto+Defeats+Small+Farmers+in+Critical+Bioethics+Class+Action+Suit/article24118.htmhttp://www.ucsusa.org/food_and_agriculture/science_and_impacts/impacts_genetic_engineering/promoting-resistant-pests.html
Pic props: http://www.odinistpressservice.com/2011/12/19/monsanto-defeated-by-super-weeds/