1. city planning/ being more efficient is a good idea regardless of our fuel source. as populations grow, resources will become more limited regardless of which fuel source we're using. sustainability is important.
2. the economics of oil don't change the environmental impact of bio-fuels. the economics of oil are driven by the gov't, big business, int'l politics. lets get out of the game all together.
3. why is everyone focused on a single answer. be more efficient, find multiple sources of alternative energy. (biofuels, ethanol, hydrogen, electric, solar, other????) diversify the portfolio! we're likely to have less impact this way and more options.
4. animal protein can be an important part of a diet. americans eat it as a larger percentage of their diets than other parts of the world. if we moderated our intake more, factory farming would be reduced. its gross!