The thing that bothers me about the current situation is that this trend would continue even if you wiped every trace of mankind from the earth. As is said in the article, natural methane out-gassing will continue regardless of how we curtail our emissions, not to mention CO2 out-gassing that also occurs through volcanic and tectonic vectors.<p>To combat this problem, we will need a system to actively remove greenhouse gasses from the atmosphere en mass (something that is very, very hard to do to a magnitude that would actually affect climate change significantly).
How far away are we from developing a scalable air filter for CO2? I found this.. <a href="https://www.technologyreview.com/s/531346/can-sucking-co2-out-of-the-atmosphere-really-work/" rel="nofollow">https://www.technologyreview.com/s/531346/can-sucking-co2-ou...</a>