Your evidence for climate change is a xkcd comic? Individual intervention will do nothing, other actors still participate freely, it's basically a tragedy of the commons.

Will actual top-down interventions even work? I doubt western society reverting to 1950s to 1970s of carbon emission will do much, white countries only make up like a 1/5 of global carbon emissions. The elite and intellectuals will use whatever convenient rationalization to justify mass migration, weather it be global poverty (see Bryan Caplan), military / geopolitics (see Matthew Yglesia), climate change etc. Assuming that AGW continues on unimpeded and it's worst predictions come true Bangladesh, Botswana and some pacific islands are wiped off the earth, it doesn't mean we need to accept climate refugees into white countries, their are plenty of other countries they can be invited to (namely the countries that are close to them).

Im not denying AGW. I just don't see it as a major priority cause.