EPA: US greenhouse gases dropped 3.4% in 2012 from 2011; down 10% from 2005 levels
Green Car Congress
APRIL 16, 2014
Other factors included a decrease in transportation sector emissions attributed to an increase in fuel efficiency across different transportation modes and limited new demand for passenger transportation. Transportation End-Use Sector. in 2012, led to an increase in overall emissions from transportation activities of 18%.
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