Certainly not negligible, but it's only about 5% of our total annual carbon emissions. https://mobile.nytimes.com/2017/06/26/climate/carbon-in-atmosphere-is-ri

Certainly not negligible, but it's only about 5% of our total annual carbon emissions. https://mobile.nytimes.com/2017/06/26/climate/carbon-in-atmosphere-is-rising-even-as-emissions-stabilize.html https://mobile.nytimes.com/2017/06/26/climate/carbon-in-atmo...