Global+Warming

=Global Warming=  

It's said that by the time a baby born today is 80 years old, the world will be 6 and a half degrees warmer than it is now. **Is global warming bad?** The earth is naturally warmed by rays (or radiation) from the sun which pass through the earth's atmosphere and are reflected back out to space again. The atmosphere's made up of layers of gases, some of which are called 'greenhouse gases'. They're mostly natural and make up a kind of thermal blanket over t he earth. This lets some of the rays back out of the atmosphere, keeping the earth at the right temperature for animals, plants and humans to survive (60°F/16°C). So some global warming is good. But if extra greenhouse gases are made, the thermal blanket gets thicker and too much heat is kept in the earth's atmosphere. That's when global warming's bad.
 * What is Global Warming?** - Global warming is the rise in temperature of the earth's atmosphere.