4 ms·
> Choke ourselves with CO2? If you look at the units of the Keeling Curvy [1] you will notice that we are around 410 ppm of CO2. The PEL is 5000 ppm [2], so no,
by lixtra 8y ago
> Choke ourselves with CO2?
If you look at the units of the Keeling Curvy [1] you will notice that we are around 410 ppm of CO2. The PEL is 5000 ppm [2], so no, we won't choke soon especially because plants grow faster[3] with more CO2 so there is a negative feedback loop (to some extend).
[1] https://en.wikipedia.org/wiki/Keeling_Curve https://en.wikipedia.org/wiki/Keeling_Curve
[2] https://en.wikipedia.org/wiki/Carbon_dioxide https://en.wikipedia.org/wiki/Carbon_dioxide
[3] https://www.scientificamerican.com/article/ask-the-experts-does-rising-co2-benefit-plants1/ https://www.scientificamerican.com/article/ask-the-experts-d...
- mikestew 8y agoIt was more a figure of speech rather than a real concern that we will literally poison ourselves with high CO2 concentrations. A more literal statement would probably be "fry ourselves with CO2", but didn't have the same punch, IMO.
- DennisP 8y agoYour second link says that 1000ppm CO2 has significant negative effects on human cognition after only 2.5 hours exposure. Your third link says that while increased CO2 in isolation makes plants grow faster, the negative effects that come with it would overwhelm any positive effects. Negative effects include drought, heat stress, invasive insects and disease, and increased forest fires. It also says that for wild plants that don't get artificial fertilizer, availability of materials like nitrogen limits their growth regardless of CO2 availability.