We don't currently have inexhaustible amounts of green energy, and we don't have any viable solution right now. If you think that because we can make 1 solar panel, we will be able to replace fossil fuels, then you have obviously never done any kind of engineering in your life. Problems come with scale. It's not being hyper-pessimistic to know that.
The problem with doomers and degrowthers is that they are pretty ignorant people. They just assume that there's no solution or that green energy is just too weak to solve problems. This is why they are arrogant and not just pessimistic. They believe they already know the answer despite never looking for possible answers in the first place.
Plus, if your only reference is the price of solar power today, then you are highly uninformed on the subject at hand. Of course solar power is cheap: in many places it is subsidized, and it is built with cheap, abundant fossil fuels. But make no mistake: solar today is absolutely marginal. So you are extrapolating from the current marginal energy production of solar to 100% of the world, with the only argument that "last you checked, solar today is very cheap" and "those who believe they know slightly more than me are arrogant, I won't listen to them".
> while not having any desire to learn.
Let me take you on that. I will share with you my favorite introduction book on the subject (it is cheap, from a really respected french engineer, and it took me 5h to read). If you do have any desire to learn, read it seriously. Now in all fairness, if you share with me the title of a serious book that explains why degrowth is "arrogant and stupid", I commit to reading it.
Do we have a deal?
My choice is "World without end" (in French: "Le monde sans fin"):
https://www.amazon.com/World-Without-End-Blain-Christophe-eb...
You can build solar and wind power without fossil fuels, or at least not much. We are able to power large vehicles and industry with renewable energy now. Most notably, with the advent of green steel, infrastructure projects in general no longer require significant use of fossil fuels. Now to be fair, this was not known to the greenies, who thought that solar panels on the roof and an EV in the garage will magical solve everything. But it is known to those who actually study this problem. This problem is rapidly resolving itself in reality.
I cannot read a book in a short amount of time. But from the sample it is just repeating fairly simplistic arguments against green energy. It is mostly a repeat of what was being said on theoildrum.com from a while back. Even then, they were mostly wrong. These days, the few areas where they were right are also being proven wrong. It is akin to the “god of the gaps” argument, where the gaps where we didn’t know how to eliminate fossil fuel usage are constantly shrinking.
Aviation came with oil, it will disappear with oil. It's not a problem of emissions per se, it's a problem of energy. Fossil fuels are not unlimited and we don't know how to completely replace them.
> The big ones are things like heating and cooling
We need to work hard on building isolation, obviously. And people need to live in smaller habitations.
> and transportation
We need more trains
> Hydrogen or liquid fuels should work, both produced from green energy.
Same thing: if you look at the numbers, we won't have enough green energy to produce enough hydrogen for aviation, even if technically we can make planes fly with hydrogen. We will have to choose where we use our hydrogen: for planes, or for steel and agriculture?
> But it won’t work if impose suffering on people.
Yep, we need to teach people and hope they accept to do what's needed to survive.
> Or do things that don’t work or don’t help.
Totally agreed here. Hoping for anything short of degrowth doesn't help. We need everything PLUS degrowth. And still, it will be hard because climate is already pretty messed up (with inertia) and biodiversity is looking bad.