Really, who are this scientists - perhaps wait and see.
Yes, CO2 is required for plants but it isn’t that simplistic.
Come the middle of this century, those still living (and I’ll guarantee most of this 500 will be dead and buried) will b3 saying what the fu** were they thinking.
Climate deniers belong with the flat earthers.
Who said the 500 were climate deniers?
Maybe actually read the letters more carefully