An effort by 22 U.S. states to spur demand for natural gas vehicles has produced a strong response from auto dealers to a request to supply CNG-powered cars, vans and trucks for state fleets.

Dealerships in 28 states representing the three big U.S. manufacturers plus Honda submitted more than 100 bids in response to a joint request for proposals by the states, which are seeking to boost demand for abundant domestic natural gas, and support the price after it fell to a decade-low in spring 2011. Keep reading →