Global Warming: Understanding the Forecast

American Museum amount of carbon Andrew Revkin Antarctica atmo atmosphere average temperature Brazil bulb burning carbon dioxide carbon dioxide emissions carbon dioxide levels cars century chlorofluorocarbons climate change climate models clouds CO₂ coal Coleman cool decade deforestation developed Earth efficient electric energy energy-efficient Environmental Defense Fund fossil fuels gasoline glaciers global climate models global temperature global warming green greenhouse effect greenhouse gases heat-trapping human population hundreds ice age impact increase industrialized Island Keeling Keeling Curve Loren Eiseley Loren McIntyre Lutzenberger methane miles Museum of Natural nations Natural History nitrous oxide nuclear oceans oxygen ozone layer patterns Paul Singer percent Photo photosynthesis pollution pounds of CO2 power plants predict produced reduce regions Researchers result rise risen Rocky Mountain Institute Sally Rock Point scientists sea level shift solar species summer sunlight trees tropical United warmer Washington weather winter York