SoiferI VtP Annotation: Toxic subsistence agriculture

One minor note is the difference between the red tomatoes conveyed in the caption and the image itself which shows green tomatoes: was this intentional/does it matter? I think the caption could further the message by providing a specific definition of "toxic subsistence agriculture": why is it toxic? Because of the pesticide? Because of the social circumstances that rendered the farmers having to use pesticides? Or both? A bit more elaboration on this would be helpful. Perhaps also providing some background on why the farmers have to use pesticides would be helpful--who first introduced the pesticides, where/when did the viscious cycle start? Is anyone attempting to counter the pesticide usage?