To cut to the chase, I don't think there's a snowball's chance in hell we will stay under two degrees C, and I am expecting that before we come to our senses, four plus will be on the way.
Hence direct air capture, or massive reforestation in combination with direct air capture and CO2 sequestration will be our only chance to avoid meltdown, quite literally.
Unfortunately, I don't think all the efficiency and re-cycling and personal simplification in the world will do more than delay the inevitable.
To solve the problems we have already generated, "progress traps" in the phrase coined by Ronald Wright in "A Short History of Progress" (2004), we will need ever more sophisticated strategies, such as direct air capture, quantum computing etc..., and all of these solutions require - demand - massive energy and the continuation and expansion of sophisticated institutions such as universities and research laboratories, and the investment in people to do all of this problem solving. This is the verdict of the Utah anthropologist Joseph Tainter, and his arguments are compelling in the extreme.
'Black swans' are going to metaphorically fill our skies, and the flip side of a new source, or sources, of abundant and affordable energy, from space or say fusion et al, is collapse to a state of lesser complexity.
This is what has always happened in the past history of every civilization which ran up against their particular 'limits to growth'.
Leadership grows fat and stale, like now - and the only solutions these fat cats can think of is to further impoverish the masses thru ever more war economics, which of course isn't economics at all - not in any sense.
It is a death wish, from an utterly corrupt elite who long ago forgot how to live.
Exploring is what we do - it is our path - for better or for worse.
And it is inspiring, something a Trump will never understand.
Kennedy did understand this:
"Let us throw our cap over the wall of space, and follow it there, and see what wonders lie on the other side."