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  Global Warming
What is global warming?
Is global warming bad?
What are the greenhouse gases?
How are extra greenhouse gases produced?
What's the 'ozone layer' got to do with global warming?
So what could happen?
What's being done about it?
What can I do?
Wave power
Wind power
Water power (hydro electricity)
Other ways of making green energy

 
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 the 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 (60F/16C).

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.


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