Just connecting a few dots here, but there's an outside chance that doomsters could be confounded by technofixes involving space technologies.
A couple of years ago, The Sun newspaper reported on a planned NASA exploration of some of the asteroids sharing Jupiter's orbital path around the sun. One, "16 Psyche", appears to be the metallic core of a protoplanet and contains vast amounts of iron, nickel and precious metals:
How could we extract these materials profitably and get them to where they are needed?
Could we bring an asteroid home?
And what about the potential out there for solar power generation?
If we are able to gather energy in space, how do we get it back to Earth? One suggestion is to beam it through the atmosphere down to ground-based receivers - but this involves energy loss on the way, and problems with ensuring that the beam is directed accurately and safely.
Here's a suggestion that occurs to me - probably kited already among the bright brains in those research units: space elevators (cables tied to the ground at one end, and to a geostationary satellite at the other.)
People are already experimenting with the idea on a smaller scale:
- but instead of (or as well as) being a ladder for space vehicles to climb into orbit, couldn't they be high-tension power cables?