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Annually, we shower over 5 billion pounds of pesticides across the Earth to control insects, unwanted weeds, funguses, rodents, and bacteria that may threaten our food supply. But is it worth it, knowing what we do about the associated environmental and public health risks? Fernan PérezGálvez weighs the pros and cons of pesticides.

Lesson by Fernan PérezGálvez, animation by Mighty Oak.