Lake Erie’s annual summer bloom is underway, and it's shaping up to be one of the most severe in the past decade.

Plants on land have helped slow global warming by capturing nearly a quarter of the carbon dioxide that human activities release in an average year. But where is it all going?

Global warming is one symptom of the much larger problem of human-caused climate change.

On the afternoon of May 23, Alaska set a new statewide record for the earliest day in the year with a temperature in the 90s.

Montzka in a snow pit in Antarctica

Some of the chemicals that replaced ozone-harming CFCs are long-lived greenhouse gases. At NOAA's lab in Boulder, Colorado, chemist Steve Montzka leads the effort to monitor the concentration of CFC-substitutes and their potential impact on global warming.

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