'The so-called "Big Six" agrichemical companies—Monsanto, Syngenta, Dow Agrosciences, BASF, Bayer, and Pioneer (DuPont)—are sitting pretty. Together, they control nearly 70 percent of the global pesticide market, and essentially the entire market for genetically modified seeds. Prices of the crops they focus on—corn, soy, cotton, etc.—are soaring, pushed up by severe drought in key growing regions. Higher crop prices typically translate to increased pesticide sales as farmers have more money to spend on agrichemicals and more incentive to maximize yield.

The companies operate globally—and have gained a stronghold in that emerging center of industrial agriculture, Brazil—but the biotech-friendly US is their profit center. They've got a big chunk of US agriculture pretty well sewn up—their GMO seeds dominate our corn, soy and cotton crops, which account for more than 53 percent of US farmland, and have won approval for GMO alfalfa (hay), which accounts for another 19 percent.

The vast annual US corn crop—which accounts for 40 percent of the globe's corn most years—is a particular bonanza, not just for GMO seeds but also a stunning amount of insecticides, fungicides, and herbicides.'

Read more: Biotech Giants Are Bankrolling a GMO Free-for-All