[Humans and Global Warming]
[Human Activity Contributions]
[Ozone]
[Land Use Emphasis on Forests]
[Industrial Contributions]
[Biomass Burning (2)]
[Biomass Burning (7/8)]
[Carbon Cycle]
[Chemistry]
[CO2 and Carbon Cycle]
[Relationship to El Nino]
[Plants and Increased CO2]
[Polar Ice (7/8)]
[Polar Ice (9)]
[Ocean Effects]
[Alternative Energy]
[Climate and Weather]
[Extraterrestrial Factors]