How do these clowns know what optimal carbon dioxide concentrations is? Plants increase photosynthesis at higher carbon dioxide levels. These clowns are playing with fire.
Emaciated polar bear skeletons floating on frozen sea ice on a dead planet is a much better outcome than fat, healthy polar bears swimming in open water with Canadian and Russian tundra becoming breadbaskets.
“How do these clowns know what optimal carbon dioxide concentrations is?”
Nor can these global warming freaks answer this simple question:
1. What’s the optimum temperature, humidity and cloud cover for Houston, Texas at 7pm on April 22? And why?