Here’s a link to a free film about genetically modified foods. It’s a bit overwrought, but it does have a lot of useful info.
For me, just learning that the pesticide-producing crops make bug stomachs explode is enough to give pause – and we’re talking 88% of corn, 94% of soy?!
If you prefer to skip the scary stats (or are already convinced), here’s a helpful website for shopping GMO-free.