Global Energy Balance Explained

NASA's Earth Observatory site has great article on how the Earth's energy balance works. This topic is central to understanding global climate change, so if you really want to understand global warming, read this article. Without the blanket of air that surrounds us this planet this would be a very cold place to live. Interestingly, even with an atmosphere, without carbon dioxide it would still be a cold planet ( around 10 to 0 degrees average). A little carbon dioxide is a good thing, too much and you have a planet like Venus with an 800 degree surface temperature!