Based on the evidence, about 97% of climate scientists agree that human-caused climate change is happening.
What We Know
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.
Read the Backgrounder » Based on the evidence, about 97% of climate scientists agree that human-caused climate change is happening.