WHAT IS GLOBAL WARMING?
Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.
The term "global warming" is a specific example of climate change, which can also refer to global cooling.
All the information above came from: http://epa.gov/climatechange/kids/cc.html
