Yes, frankly, I don't know what to do about this. The only completely renewable method we have for carbon-fixing on a massive scale is the planting of vegetation. But you would essentially need a near-soulless global police force to prevent, for example, the entire continent of Asia from chopping trees in the winter, and burning coal to cook their food.
Instead, I get the creeping suspicion that our generation - yours and mine - is going to bear witness to an absolutely unfathomable amount of human death and misery. We will fry, drown, and starve off this planet until our numbers become harmless again.