Adapt or perish. Too many people want to live as Americans do. Refrigerators, multiple vehicles, gluttony, gratuitous flaunting of our "greatness", corporate food, excessive animal cadaver consumption. Ubiquitous plastic, electric lights everywhere. blah blah blah. Are we the sole peoples permitted the advantages of rainforest de forestation? It is our consumption that is driving the trajectory towards calamity. The climate always changes. Can we adapt or modify the extremes? Capitalism needs a check. That check is democratic socialism. & environmentalism. To be decided.

I don't think anything practical can be done to reverse course quickly enough. I think in 50-100 years low lying areas of the world will be in deep trouble, including Manhattan, parts of the Florida, etc. We can, are, and will find various kinds of renewable sources which will replace fossil fuels one day, but not before significant damage is done.

Hard to say. The UK and Europe now get more than half from renewables, which is getting somewhere, but it may be different in the US and the developing world, and is it enough ?

No. We are too lazy and greedy. We will measure the damage on the planet by dollars. What is acceptable?

The Sun is scheduled to explode or expand into a red giant stat in a few billion years. I think this immimate warming concern is nothing compared to the atmosphere in a few billion years.

Yep.