Spare The Air Day

Call it the law of unintended consequences. Alerts of "bad air days" that ask motorists in the Wasatch Front to reduce driving had the opposite effect, prompting some residents to drive away from lowlands to the mountains where air may be healthier.
Sep 12, 2013   The Salt Lake Tribune
A promotion by Shell Oil and Lucky supermarkets conflicted with a regional alert to reduce driving due to an ozone alert. Motorists lined up in the morning for free gasoline at a San Francisco Shell station during a 'Spare The Air' Day on Sept. 28.
Sep 30, 2011   The San Francisco Examiner