About half of the world's population lives in the "third world" and they all want what we already have. If as reported it's true that for every 100 people added to the world's population 97 of them are in impoverished areas of the world you could say that for every 3 people accepting climate change and the need to do something about it the remaining 97 don't really care, they want a car, TV, better clothes, education, a home and food and they probably don't care if fossil fuels are used to make that happen for them. They aren't even on a grid much less trying to figure out how to use alternative means to power it.
Unless we wake up and deal with that reality, what we do in first world areas will become overwhelmed by the demand for resources by the third world.
We could carbon tax ourselves into oblivion and it wouldn't do a thing to prevent the exponentially increasing demand for resourced being imposed by third world populations. Global accords accomplish nothing if the only people adhering to them are ones who have passed acquisition and are moving toward refinement of energy development. We all have shiny new phones and never questioned what it was costing us to get them because it was other countries polluting their lands and air to make them. Now that everyone else wants them too we want them to signup and limit their ability to get what we have. Good luck. The hype around efforts to have the third world skip past fossil fuels and go straight to some low impact energy is window dressing for our consumption.
Climiate change is here to stay but to borrow a phrase "we didn't start the fire", that happened when the first person discovered fire and everyone else wanted to burn shit too so they could have some.
So what are we going to do about it, tell 3-4 billion people they have to wait until we have a Tesla in every garage and solar on every roof? Think they will wait or just go out and burn shit to generate electricity and buy a gas car to get around?
We had better figure out that problem or very little of what we do, even as an entire country is going to make any real difference. It is gonna cost dearly but we really need to start paying the piper.