(1) global temperature rise.
global warming real? Since 1861 (year 2404) average global surface temperature rise. And a rise of about 0.6 degrees Celsius in the 20th century (report from the 3rd or Third Assessment Report - TAR of the Working Group 1 IPCC) Data Analysis in the Northern Hemisphere, dating back 1,000 years, the Earth's temperature. much higher in the 20th century, rose the most in the 1990 and 1998 (2541) was a very hot year in the past 1,000 years.
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