Global warming refers to the gradual increase of Earth’s - TopicsExpress



          

Global warming refers to the gradual increase of Earth’s temperature, which in layman’s terms, means that the world is heating up. It is caused by greenhouse gases like carbon dioxide in the atmosphere. These gases trap in heat causing a natural heating up of the Earths atmosphere - called the greenhouse effect. It is known that the surface temperature on Earth has risen by about half a degree Celsius in the last 100 years and scientists predict that the Earth will be warmer in the future
Posted on: Sat, 01 Feb 2014 14:05:46 +0000

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