Vaughan Pratt
What evidence do you have for your statement:
“Preindustrially this flux was in balance and CO2 was not under any great pressure to change rapidly in a single century”
The 4% anthropogenic contribution must be compared with varying natural CO2 fluxes caused by variations in temperature and moisture etc. See Murry Salby’s presentation
JoNova provides some figs. Blockbuster: Planetary temperature controls CO2 levels — not humans
