Nine people were arrested Wednesday in a protest that disrupted a Monsanto (NYSE: MON) seed facility in California. The demonstrators want genetically modified organisms (GMOs) removed from the food supply, citing a lack of regulation and concern about animal, human, and environmental health, according to reports.

Trucks could not enter or leave the Monsanto location for close to six hours, according to a Reuters report that said some of the protesters, a few of whom were dressed in biohazard suits, chained themselves to vehicles and attempted to block truck entrances.

Supporters of GMO crops argue that farmers benefit tremendously from the increase in productivity GMOs enable. Corn, soybeans, sugar beets, and canola -- in other words, ingredients used in just about everything -- are a few of the main GMO crops.

Though the focus Wednesday was on Monsanto, the company is not the only player in the genetically engineered agriculture market. E.I. DuPont de Nemours and Dow Chemical also offer a variety of GMOs.

Fool contributor John Divine owns no shares in any of the companies above. You can follow him on Twitter @divinebizkid and on Motley Fool CAPS @TMFDivine.

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