Rolling Green: Carmakers show off their eco-friendliest offerings at the Chicago Auto Show
The other green-car option hard to miss at the Chicago show is diesel-clean diesels, not the soot-belching engines you’ve been stuck behind in a traffic jam. Diesels have a reputation for good fuel economy, and their carbon dioxide emissions are lower. But the engines churn out more fine particles and more nitrous oxides which can form smog.
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