Much of our carbon contribution comes from deforestation, soil erosion, etc. In other words, habitat loss and conversion. For example, there used to be forestat

Much of our carbon contribution comes from deforestation, soil erosion, etc. In other words, habitat loss and conversion. For example, there used to be forestation across much of the "Fertile Crescent" before we had our way. Manhattan was a thousand year growth forest before Europeans showed up. Removing the dead hand of man from the scale can do much to reverse this process; actively fostering reforestation (see: Dune) can do more. We are over budget here - putting 1000 gigatons of C back is going to be tough. But putting a good chunk of that away is probably the result of something like: humanity stops eating meat and reduces its agricultural footprint, commits most of the earth to nature preserves.