Atmospheric CO2 concentrations pass 350 ppm, considered to be the “safe” upper limit for carbon dioxide concentrations in the atmosphere. Prior to the Industrial Revolution, the atmosphere contained CO2 levels of about 280 ppm. Today, atmospheric concentrations of CO2 surpass 400 ppm.
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Atmospheric CO2 concentrations pass 350 ppm, considered to be the “safe” upper limit for carbon dioxide concentrations in the atmosphere. Prior to the Industrial Revolution, the atmosphere contained CO2 levels of about 280 ppm. Today, atmospheric concentrations of CO2 surpass 400 ppm.