What We Know

What We Know

The scientists agree. The climate is changing, it’s caused by human behavior, and the risks ahead are real. Learn about the consensus.
  • What We Know
  • Hear from Scientists
  • About the Initiative
    • The Panel

What We Know

  • What We Know
  • Hear from Scientists
  • About the Initiative
    • The Panel

Based on the evidence, about 97% of climate experts have concluded that human-caused climate change is happening. What We Know helps us understand the science behind the realities, risks and response to the climate challenge.

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About the Initiative

Understanding science is our work. Our consensus is that climate change is happening and the risks are real. Learn more about AAAS and the What We Know initiative.

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  • Consensus Sense

    The AAAS “What We Know” initiative is about sharing what climate experts have concluded...
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What We Know

The American Association for the Advancement of Science (AAAS) is the world’s largest non-government general science membership organization and the executive publisher of Science, a leading scientific journal. Its mission is “advance science for the benefit of all people.” Its goals include providing a voice for science on societal issues and promoting the responsible use of science in public policy. There may be no more pressing issue intersecting science and society than climate change and the What We Know initiative was born in response to that reality.

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