New climate data shows the period from May 2011 to April 2012 was the warmest ever recorded in the United States. The average temperature over the 12-month stretch was nearly three degrees Fahrenheit above last century’s average. In recent months, the United States has seen several notable signs of climate change, including the warmest March on record.
U.S. Sees Warmest 12 Months on Record
HeadlineMay 10, 2012