News Earth Carcinogens from car exhaust can linger Cancer-causing agents' interaction with nanoparticles could make the chemicals as harmful as cigarette smoke, lab study suggests By Davide Castelvecchi August 18, 2008 at 5:32 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Normal 0 false false false MicrosoftInternetExplorer4 PHILADELPHIA, Aug.