What percentage of the CO2 in the atmosphere has been produced by human beings through the burning of fossil fuels?

Human CO2 is a tiny % of CO2 emissions"The oceans contain 37,400 billion tons (GT) of suspended carbon, land biomass has 2000-3000 GT. The atpmosphere contains 720 billion tons of CO2 and humans contribute only 6 GT additional load on this balance. The oceans, land and atpmosphere exchange CO2 continuously so the additional load by humans is incredibly small. A small shift in the balance between oceans and air would cause a CO2 much more severe rise than anything we could produce."

What percentage of the CO2 in the atmosphere has been produced by human beings through the burning of fossil fuels?

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