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National Climate Assessment




  1. Global annual surface air temperatures have increased by 1.8 degree Fahrenheit over the last 115 years.

  2. It’s the warmest in the history of modern civilization, and these trends are expected to continue.

  3. Based on voluminous evidence, it is extremely likely that human activities are the dominant cause of the observed trends since the mid-twentieth century.

  4. There is no convincing alternative explanation supported by evidence to explain the warming over the last century. To learn more about the findings of this report, implications for the future of humanity, and what you can do with your own energy activities to act locally, Listen Up to this week’s Energy Show on Renewable Energy World.

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