It's amazing. How does this woman stay in office? She's a moron!
Carbon dioxide levels in the atmosphere average about 400 ppm. 1% Co2 is about 10,000 ppm. 3% would be toxic if not life threatening. And while carbon dioxide does occur naturally, it is not 'harmless' at concentration. Start your car and hunker down behind it, Mrs Science, breathing the fumes from your exhaust for a few minutes and tell us all how 'unharmed' you feel.
I'm thankful daily for the simpletons the Republicans draw to their flame.