So, besides the fact that bicycle shorts are made mainly of petroleum, there are a lot of reasons I'm not an anti-petroleum or anti-car purist.

I use petroleum-derived electricity every day. There are times I'd be really irritated if I couldn't use a fan, a light bulb, a computer, or a phone. The water company uses petroleum power to pump water to me, and I pay for natural gas to heat my shower water, not to mention heating my apartment. I sleep on a bed made with the aid of petroleum for processing of metal and wood, not to mention foams and fabrics made from petroleum. I buy stuff at stores that get their stuff from automobiles.

Which brings me to a political viewpoint I imagine many of you would share:
A) carpool lanes are a good thing and 3000 pound vehicles transporting nothing but one 150-pound person are wasteful
B) trucks transporting thousands of pounds of stuff can be really worthwhile and they ought to get equal status to multi-occupant vehicles and buses on roads

A lot of motorists seem to think that cars are the best vehicle on the road and that buses and cargo trucks should get out of their way. I think the opposite is true. A bus carrying 40 people is a very efficient use of roads* and (generally) so is a truck carrying goods that will make 400 people's lives easier. These vehicles ought to be made a priority in road design via carpool lanes and maybe other means. Cars are so convenient, and that's why people use them so much. They're often an inconvenience to users of buses, trains, and bikes, but they're still made a priority in our society.

*and fuel