United Airlines plane sits on the tarmac at San Francisco International Airport on June 10 2015 in San Francisco California The Environmental...
{"Image ImageDescription": "SAN FRANCISCO, CA - JUNE 10:  A United Airlines plane sits on the tarmac at San Francisco International Airport on June 10, 2015 in San Francisco, California.  The Environmental Protection Agency is taking the first steps to start the process of regulating greenhouse gas emissions from airplane exhaust.  (Photo by Justin Sullivan/Getty Images)", "Image Copyright": "2015 Getty Images"}