Every person here is breathing out 40,000 ppm CO2

By Jo Nova

Elon is scratching for a reason to keep worrying about CO2

In the interview with Donald Trump, Elon Musk tried to argue that we ought be limiting carbon dioxide because we are too close to 1,000ppm where people get headaches. Not to put too fine a point on it, but we breath out air at 40,000 ppm fifteen times a minute for our entire lives. If 1,000 ppm gave us a headache or made us nauseous, we’d have to hold our breath every time we kissed someone.

@ElonMusk: The point I was making is that, even if CO2 did not cause global warming, it is uncomfortable to breathe air with >1000 ppm of CO2. Given that the outdoor ppm away from cities is now ~420 (lol), it is already getting close to 1000 ppm indoors in cities at times. You can buy a cheap CO2 monitor and measure this for yourself.

As the global base level of CO2 keeps increasing, it will cause air quality in cities to feel stuffy and unpleasant, resulting in drowsiness, poor concentration and eventually headaches and nausea. […]