[matthewdgreen]

I don’t know if we should actually deploy geoengineering. My fear is that we will soon reach a point where we’re pretty certain that we’re headed towards a major tipping point, and even aggressive GHG reductions won’t be enough. (It’s possible that the findings in TFA are the literal representation of that realization.) We need a hail-Mary option at that point and we might need it in a hurry.

BTW I am actually cautiously optimistic about the GHG reduction piece. We’re way past where we should be at this stage, but rapid decarbonization now looks like it will be at least technically possible. Most global emissions are in China and Asia, and China is actually deploying the technology we need to eliminate those emissions. The US shouldn’t be screwing around the way it is, but I’m hopeful that what’s happening with renewable technology costs in Asia will eventually be more meaningful than any short term political interference that’s limited to the US. (This is very much a lemonade-out-of-lemons opinion, but the alternative is to be very depressed.)