Hey Raul,
While I am still out on whether or not global warming is caused man or is cyclical I am for reducing pollution. I don't think anyone has to be a rocket scientist to know that all of this pollution cannot be good for the environment. If 10% of diesel drivers did use a bio fuel it would greatly reduce pollution, I mean that is a lot of vehicles.
I would like to see more emphasis on keeping our planet clean in all areas; air pollution, litter, water pollution, etc....
Good topic,
Craig