emissions

https://www.flickr.com/photos/gcf_riyadh/5418883143/in/photolist-9fRcaH-ek3y2Y-YvwYPQ-pzYUUm-yRTLcq-zNUTJX-o8PXNi

Ex-VW Honcho Indicted for Rigging Cars to Pass U.S. Emissions Tests

By InSapphoWeTrust from Los Angeles, California, USA - Park La Brea and Baldwin Hills, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=24269964

Paints, Pesticides and Perfume: Science Magazine Discovers More Than Cars to Blame for Smog

Ford Diesel Trucks Allegedly Cheating Emissions