We understand that some increase in CO2 levels is good for plants, and can increase crop yields. We understand that too little CO2 can result in a catastrophic collapse of the food web. And we do not understand the global climate well enough to interfere with it, as the results could be bad - very bad indeed.

Yes, a slight increase in CO2 can have some warming effects. So can the sun, so can volcanoes, and so can many other factors. But everything comes with tradeoffs, and if you ask people around the world who depend on plant crops for survival if they would prefer a couple of degrees cooler summers or having plenty to eat, I'm pretty sure I know which option they will choose.' //

ibt
2 hours ago
Next time your "climate change" relative starts bloviating, ask them "What is the ideal Global Surface Mean temperature in Celsius degrees?" or "What is the ideal PPM for CO2 in the atmosphere?". And ask them to show their work. //

anon-lsnr
3 hours ago
Every acre of corn produces enough oxygen for 131 people per year. 90 million acres of corn in US =enough air for 1.1 billion people per year.Jul 19, 2023. //

Bertrand du Guesclin
an hour ago
With a more CO2-rich atmosphere, plants don't have to open their pores as much to ingest the compound. That means such ingestion allows less water evaporation from the plant. Such water conservation is important in dry regions, which is why such regions (like Africa's Sahel) are getting greener. //

stripmallgrackle
an hour ago edited
Two years ago I watched and interview with a physicist (can't remember his name). He was discussing the saturation point of CO2. He mocked climate science for predicting all hell breaking loose due to runaway atmospheric heating. He stated that physics supports no such hypothesis and presented a curve that is familiar to any electronics student: the saturation curve for the transistor (tubes for us old farts). This, he pointed out, shows the limit on the conversion of UV to IR by CO2 by density in a gas mixture. For those not familiar, at the top the curve flattens to horizontal and any additional input voltage (for transistors) or UV energy (for CO2) will not increase the output of the transistor or the CO2 mixture. Saturation. His point was that arguing client sensitivity is absurd, as CO2 is self limiting on how much heat it can trap no matter how many PPM.

Almost as an aside, he mentioned at one point that all the plant species on Earth, except corn, evolved in a much richer CO2 atmosphere, and today the plant kingdom is living in a CO2 desert. //

anon-73eu mopani 2 days ago

https://skepticalscience.com/pics/fosteretal2017fromexcel-1600px.jpg

stripmallgrackle mopani 2 days ago

Wish I could help. I found these two YouTubes from Dr. William Happer. It may have been him, but I remember a man with somewhat longer hair. Searching for CO2 saturation/physicist puts Happer at the top of hits. The short 2 min video is specifically his statement about plants and a CO2 famine. I will be watching the longer lecture video tonight.

https://www.youtube.com/watch?v=MKcBM5gaFEk
https://www.youtube.com/watch?v=M8iEEO2UIbA