Which state has the most alternative fuel-saving vehicles per capita?

Question

Choose from Iowa, New York, and Oklahoma.

Answer 1

New York. They are the second greenest state in the USA. The first is California.

Answer 2

Apparently it goes

Oklahoma

Iowa

New York

Which is entirely counter-intuitive.  I'd like to see an explanation of that.

Answer 3

Iowa.

A large percentage of cars in Iowa burn "gasohol"... 10% alcohol content fuel

Most (if not all) Iowa State operated vehicles operate on bio-fuels.  Soy-diesel. E-85 or straight methanol.