There are many causes of environmental changes on Earth. Natural events cause changes in climate. For example, large volcanic eruptions release tiny particles into the atmosphere that block sunlight, resulting in surface cooling that lasts for a few...

A climate change brought about by humans, rather than by...

Although large changes in climate are a natural part of Earth history, there is little doubt that human activities have caused observed patterns of global warming in the twentieth and twenty-first centuries. Global climate change has large implications...

Global climate change refers to the ways in which average planetary weather patterns alter over time. The term global warming, though common, is a misnomer, for under some scenarios it is possible that part of the earth could cool, even as most of the...

Climate change is the variation in the Earth's global climate or in regional climates over time. It involves changes in the variability or average state of the atmosphere over durations ranging from decades to millions of years. These changes can be...

States should develop creative approaches to climate change, just as they have with challenges such as health care, despite their different economic interests, governors said Saturday."No individual state is going to solve the climate change problem, but we can do our part," Minnesota Gov. Tim...

Latin America and other poor regions of the world will bear the brunt of climate change, a top official from the organization that shared this year's Nobel Peace Prize said Thursday.The Intergovernmental Panel on Climate Change, a U.N. network of scientists, was awarded the prize...

Top intelligence analysts are diving into the politically sensitive issue of climate change, but some Democrats in Congress are demanding even more.The House Intelligence Committee approved a provision late Wednesday as part of a spy budget bill that would require the National Intelligence Council to...

Pacific Rim nations reached tentative agreement on the need "to slow, stop and then reverse" climate change, setting nonbinding goals to improve energy use, according to a draft statement Saturday.The draft statement that leaders at the 21-member Asia Pacific Economic Cooperation summit will consider Saturday...

Examines the issue of global climate change. Explains the greenhouse effect. Provides statistical detail. Discusses the political implications of the issue.