Oh, and to be clear -- living in cities without cars, eating minimal amounts of high-quality meat, reducing waste, maximizing renewables, dumping coal -- these all have benefits to the self and society WITHOUT the virtue of co2 reduction. We don't need to fight human nature or overcome impossible odds to mitigate runaway climate change. It's just slow work and it's actually happening! A lot to be proud of.

But if the permafrost starts melting, spiking methane, we'd better take the technological approaches available!