Global warming is an increase in the temperature of the Earth's surface air and oceans. An increase in the Earths temperatures
can cause rising sea levels and changes in precipitation. While it is proven that Earth's temperature has naturally changed in the
past there is scientific evidence that the current changes are more serious because they are a direct result of man made elements.
Wikipedia
Wikipedia provides a comprehensive guide to global warming. It provides information on the changes in temperature and what is causing it.
Sierra Club
The Sierra Club is America's oldest, largest and most influential grassroots environmental organization. They are on the front line in the fight against global warming.
c Global Environment
Global Warming is a serious threat to our environment. Here are some reference sites.
