What % of the Atmosphere is c02?

At a hearing to review implementation of the bipartisan Infrastructure Investment and Jobs Act, House members queried four transportation experts.

Rep. Doug LaMalfa, R-Calif., puzzled them with a question about carbon dioxide.

What % of our atmosphere is CO2?

0.04%... If we get below 0.02% plant life starts dying off

--Classic but a good one to bring around again