what are some good eco-friendly cars that are fairly inexpensive?

the question pretty much explains itself.

What is an inexpensive, eco-friendly laundry detergent?

I am looking for an eco-friendly laundry detergent, but I don’t want to have to pay an arm and a leg for it. I also prefer the liquid to powder. Right now I am using All Small and Mighty. I would like something more natural, but that still smells good and clean. Any suggestions?

what is the most inexpensive, eco friendly car available in the US?

i was reading about the Tata Nano which only costs $2500 but is not yet in the states. it also only has 33hp- i was hoping for something with a little more oomph. what are my other options for small fuel friendly cars?