Meteorologist explains why Carbon dioxide (CO₂) is not ‘pollution’ – ‘Atmospheric CO₂ level is currently 428 ppmv, & the concentration has only been as high as 7,000 ppm within the last 600 million years’

Carbon dioxide (CO₂) is not “pollution.”

All science is numbers, so here are some numbers for you, Congresswoman.

CO₂ makes up only 0.04% of the Earth’s atmosphere. For every 1 million molecules of air, about 428 of them are CO₂. That is, 4 out of every 10,000. A century… https://t.co/Oc2DNFeWbB pic.twitter.com/Xo1ZUJBksa

— Chris Martz (@ChrisMartzWX) February 15, 2026