Global Warming: More Proof

We already have data showing that the average global temperature has increased in the past 50 years, and that spring is arriving earlier. Now a new study by researchers at UC Berkeley and Harvard shows that all the seasons are arriving two days earlier. In non-tropical areas the hottest day of the year is coming nearly two days earlier, and the difference between summer and winter land temperatures has decreased. Winter temperatures have warmed more than those in summer—1.8 degrees Celsius (3.24 degrees Fahrenheit) and 1 degree C (1.8 degrees F) , respectively. 

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