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2001 - U.S. President George W. Bush publicly rejects the 1997 Kyoto Protocol to rein in greenhouse gases.
2005 - After Russia's ratification, the Kyoto Protocol takes effect for 37 industrialized nations.
2005 - The year's average global temperatures are the highest in recorded history, NASA reports.
2007 - The summer melt of Arctic sea ice is the greatest on record, the U.S. National Snow and Ice Data Center reports.
2007 - In its first assessment in six years, the U.N. scientific panel on climate projects temperatures may rise as much as 11.5 degrees Fahrenheit (6.4 degrees C) in the 21st century if nothing is done.
2009 - Focus falls on December's U.N. climate conference in Copenhagen as the arena for a new global agreement to combat warming.
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animations & interactives
- County-by-county carbon emissions
- Climate future: Steps some countries are taking
- Results of AP-Stanford poll on global warming
- Climate conference draws eclectic mix of humanity
- Climate conference: Nations to set new goals
- Climate change: Key dates in global warming
- Global warming: Cities vulnerable to rising waters
- Green Remodeling: New, rediscovered in demand
- Eco-dilemmas: Tough choices for consumers
- Fit and Green: Shed pounds, help the Earth
- China: Too much trash
- The northern front: A forewarning of changes
- Contaminated water: Children exposed at school
- Pharmaceuticals in the Water
- SFgate.com: You decide who gets California's water
