Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Fifth National Climate Assessment - Read the Report
U.S. Global Change Research Program Releases Fifth National Climate Assessment
The Fifth National Climate Assessment (NCA5) is the preeminent source of authoritative information on the risks, impacts, and responses to climate change in the United States.
