Warming Marches in

Warming Marches in

March 2012 was the balmiest on record for the continental United States, setting a mountain of new records

By Janet Raloff, 15:58 PM April 10, 2012

People may argue about why Earth is warming, how long its fever will last and whether any of this warrants immediate corrective action. But whether Earth is warming is no longer open to debate. The National Oceanic and Atmospheric Administration has just published domestic examples to reinforce what Americans witnessed last month — either on TV or in their own backyards.

Let's start with the heat: March 2012 temperatures averaged 10.6° Celsius (51° Fahrenheit) — or 5.5 °C warmer than the 20...

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