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.

June 4, 2019

Carbon dioxide levels hit record peak in May

June 4, 2019

Monthly average surpassed 414 parts per million at Mauna Loa observatory Atmospheric carbon dioxide continued its rapid rise in 2019, with the average for May […]

Carbon dioxide levels hit record peak in May Read More >

June 4, 2019

Carbon dioxide levels hit record peak in May

Popup Call to Action