Anthropogenic CO2 emissions are now ~40B tons/yr. The number is a bit difficult to comprehend... Scientific American had a recent article putting that in some context. The crazy scale of human carbon emissions. If you wanted to release 40B tons per year with a forest fire you would need to burn a forest this size... every year... Oops... no... AND add 3 more forests each the size of Australia This... this is insane. CARBON TAX NOW!!!! Side note: That's 40M sq miles... there's ~25M sq miles of forested area on Earth.