Charles David Keeling's measurements provided the first significant evidence of increasing atmospheric carbon dioxide concentration in the atmosphere.
A snapshot of how 2012 stacks up against the five other warmest years ever recorded in the U.S.
Recent human activity is having such a significant environmental impact on the planet that we may be entering a new geologic epoch, known as the Anthropocene.
A new study highlights 180 regions in the U.S. where sea level rise is likely to have a major impact. Here are photos of the 20 cities with populations over 300,000 which are likely to be affected.
From snatching carbon dioxide (CO2) out of the air like trees do, to launching giant mirrors into space, scientists are researching a wide variety of technologies to artificially slow global warming.
CO2 emissions from fossil fuel have been growing steadily in the US and are projected to continue growing until 2030 and beyond if no legislation is passed to reduce emissions.