Parts per million

Aug 24, 2023 419 ppm

I've added labels to dates on this website that show the global average atmospheric CO 2 levels at that time. Today is August 24th, 2023 419 ppm Ppm is short for “parts-per-million,” the unit used for measuring CO 2 concentration in the atmosphere. Humans have increased this number significantly …


Apr 07, 2023 418 ppm

Archive (2015-19)