This one I found in a “Libertarian” Facebook group in, though it’s not so libertarian.
Anyways, this picture’s claims are bullshit.
“The myth that a single volcanic eruption puts more CO2 into the atmosphere than all of mankind to date, let alone 10,000 times more, is one of the most pervasive as well as one of the most demonstrably false climatological claims out there. It stems, ultimately, from a geologist named Ian Plimer, infamous for writing a widely discredited book titled Heaven and Earth, which attempted to argue that humans have had an insignificant effect on global climate. That useless comparison would be the total mass of carbon dioxide released to the atmosphere by human activity (roughly calculated here by taking the roughly 120 ppm rise in CO2 since pre-industrial times converted into 936.5 gigatons of carbon dioxide gas) compared to the total mass of the entire atmosphere (estimated to be around 5,100,000 gigatons). This yields roughly 1 part post-industrial CO2 rise in 10,000 parts of the entire atmosphere.”
From the Carbon Dioxide Information Analysis Center:
“According to Houghton and Hackler, land-use changes from 1850-2000 resulted in a net transfer of 154 PgC to the atmosphere. During that same period, 282 PgC were released by combustion of fossil fuels, and 5.5 additional PgC were released to the atmosphere from cement manufacture. This adds up to 154 + 282 + 5.5 = 441.5 PgC, of which 282/444.1 = 64% is due to fossil-fuel combustion.
Atmospheric CO2 concentrations rose from 288 ppmv in 1850 to 369.5 ppmv in 2000, for an increase of 81.5 ppmv, or 174 PgC. In other words, about 40% (174/441.5) of the additional carbon has remained in the atmosphere, while the remaining 60% has been transferred to the oceans and terrestrial biosphere.
The 369.5 ppmv of carbon in the atmosphere, in the form of CO2, translates into 787 PgC, of which 174 PgC has been added since 1850. From […] above, we see that 64% of that 174 PgC, or 111 PgC, can be attributed to fossil-fuel combustion. This represents about 14% (111/787) of the carbon in the atmosphere in the form of CO2.”
Climate change is real. It’s easier if we just rip that band-aid off now.