The problem that global warming skeptics have had for years is they are arguing a point where their opponents – that is the proponents of AGW or human-caused global warming – are using estimates of human CO2 emissions. But skeptics in rebuttal have no measurements of global human CO2 emission, obviously because it is buried in the noise of CO2 fluxes which are at least 10 times larger.  Skeptics are arguing with a straw man on a yellow brick road.