Global warming

If people say petrol is slighty worse for the environment than diesel, and i also no diesel contains sulfur which is fairly bad for the environment, and what fuels other than using electricity, could be used in cars vans ect?

Fast food grease, hydrogen, solar, steam, and Al Gore's hot air...by the way I saw a Bugatti Veyron drive past me last month, and I damn near hit the car infront of me..those cars are bad azzz...