I’m reminded of Freeman Dyson’s essay in Edge some time ago. [1] I was struck by this statement:
“The fundamental reason why carbon dioxide in the atmosphere is critically important to biology is that there is so little of it. A field of corn growing in full sunlight in the middle of the day uses up all the carbon dioxide within a meter of the ground in about five minutes.”
[1] https://www.edge.org/conversation/heretical-thoughts-about-s...