Eco friendly cars are a hot topic at the moment. Toyota and Nissan are both leaders in this field. Lexus also do a hybrid cars. The top gear website is a good source of further information www.bbc.co.uk
Where Can I Get Information On Eco-friendly Cars?
You can check this blog about eco-friendly cars - clean-and-green-cars.blogspot.com/ .That information isn't enough but I hope it helps you.