Anonymous public comment

Carbon dioxide should not be regulated as a greenhouse gas. Real scientist don't anticipate much effect from carbon dioxide at all, much less "increasingly critical". Atmospheric carbon dioxide's greenhouse effect is logarithmic -- the first half of pre-Industrial Revolution-level effect was achieved by less than 20 parts per million, then needing the addition of 250 ppmv more to achieve the same warming increment to reach pre-IR effect and it will take a massive increase to repeat the dose again. (The "how much" depends on total sensitivity estimates but, utilizing A Field Guide to the Atmosphere (Houghton, 1983)'s commonly cited 7 K greenhouse effect for 300 ppmv (presumably from Kondratyev & Moskalenko but the origin of this common figure is obscure) then quadrupling pre-IR levels to 1120 ppmv can deliver a mere 1.71 K warming in total -- since there's already alleged to have been 0.7 K that leaves just 1 kelvin potential for adding another 740 ppmv to the current 380 ppmv.)