Our Warming World main content.

Our Warming World

Part of Hall of Planet Earth.

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.