Our Warming World main content.

Our Warming World

Part of Hall of Planet Earth.

What causes climate and climate change section of the Hall of Planet Earth. AMNH/D. Finnin

Earth is warming, and evidence clearly points to human activity as the cause. 

The recent rise in global temperature has been observed in long-term measurements of the atmosphere and oceans. Current climate change--and its unusually rapid rate--is not apparent in one day or year. But over decades, an unmistakable warming trend becomes clear.

What Makes a Trend

Evidence for climate change is not based on measurements from a single year or place. Many decades of data from instruments across the globe reveal an accelerated warming trend since the 1970s.