There was a battle in the early part of the 20th century between bioplastics and petrol-based plastics. Petrol won for 2 reasons:

1. Pressure from Big Oil companies (surprise)
2. Bioplastics weren’t fully waterproof and could degrade during shipment

Bioplastics arent currently made with genetically modified crops, although they may be in the future. Read the wikipedia article. We’re talking 100 percent biodegradable diapers here.

http://en.wikipedia.org/wiki/Bioplastic

As far as GM crops go, they aren’t necessarily evil at all. I have a hunch that the smear campaign launched against them was actually begun by the oil companies themselves, as they stand to lose billions if we invest in this technology. We’ve been genetically modifying crops for thousands of years. (Broccoli, anyone?) And I think that well-meaning environmentalists with no specific scientific knowledge have played right into their hands. There are evil aspects that must be addressed, i.e. the companies that produce them will copyright the DNA of the crops and lock them down into a kind of monopoly.

However, I am also not a scientist, and these are my feelings based on what I have read and or heard on NPR