Well the worst-case is that it "succeeds" in which case we dump a lot of money that could be better spent on seriously addressing climate change. Instead we construct new security hazards to rear their heads during whatever societal disintegration we face as climate change, the rising tide of fascism, economic mismanagement, and the lawless global system of competing blood-thirsty imperial blocs, converge down to a point.

I worry that if humanity survives all this, a thousand years from now, as new civilisations form out of the ashes, what problems they're still going to be left with.