Traffic moves on the arrival level of Los Angeles International Airport in Los Angeles, California in this file photo taken November 21, 2012. The Obama administration on Monday announced new fuel and... more 
Traffic moves on the arrival level of Los Angeles International Airport in Los Angeles, California in this file photo taken November 21, 2012. The Obama administration on Monday announced new fuel and automobile rules to cut soot, smog and toxic emissions, which it says will help reduce asthma and heart attacks. REUTERS/Jonathan Alcorn/Files (UNITED STATES - Tags: TRANSPORT POLITICS ENVIRONMENT HEALTH) less 
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Reuters | Photo By JONATHAN ALCORN / REUTERS
Mon, Mar 3, 2014 2:20 PM EST