EPA’s indicators use the best available observed data to show how the climate is changing. 

The Earth’s climate is changing. Observations from around the world show the widespread effects of increasing greenhouse gas concentrations on Earth’s climate.

For example:

• High temperature extremes, droughts, and heavy precipitation events are becoming more frequent and intense.
• Glaciers and snow cover are shrinking, and sea ice is retreating.
• Seas are warming, rising, and becoming more acidic, and marine species are moving to new locations in colder waters.
• Flooding is becoming more frequent along the U.S. coastline.
• Growing seasons are lengthening, and areas burned by wildfire are growing.

These and many other changes are evidence of a warming world.