National Geographic provides concise facts on global warming and the effect that the earth's rising temperature has on our lives.
Global warming, or climate change, is a subject that shows no sign of cooling down.
Is It Happening?
Yes. Earth is already showing many signs of worldwide climate change.
â€¢ Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.
â€¢ The rate of warming is increasing. The 20th century's last two decades were the hottest in 400 years and possibly the warmest for several millennia, according to a number of climate studies. And the United Nations' Intergovernmental Panel on Climate Change (IPCC) reports that 11 of the past 12 years are among the dozen warmest since 1850.