Cleaning Up the Dirty Diesels

The rule in driving these days seems to be that bigger is better, with
light trucks and sport utility vehicles overtaking the road. But as
automakers bask in their high profits from the pricey vehicles, a new
challenge looms…how to make them more fuel efficient. The trucks guzzle
substantially more gas and emit more pollutants than passenger cars and
the government is putting pressure on automakers to clean them up. Now,
an unlikely candidate is emerging to solve the problem. The Great Lakes
Radio Consortium’s Julie Edelson Halpert reports: