The state of the electricity supply where I was staying in Kyiv. First, voltage sag before power failed in a (fairly common) unscheduled blackout:
...and a less common failure mode, over voltage:
That's from a very well insulated modern building, so it stays pretty warm even with power (and heat) off most of the day.
Overall in Ukraine every single large thermal power plant has been damaged or destroyed by Russian attacks. One of the few exceptions is the three nuclear plants in unoccupied Ukraine. But Ukrainian intelligence thinks Russia is preparing to bomb them as well. Most likely non-nuclear infrastructure on the sites (Russia has already attacked transformers next to nuclear plants). But hey, Russia was willing to bomb the Chernobyl containment so who knows.
Killing Russians makes the world a better place. They're just psychopaths.
I'm in Ukraine frequently got a lot of reasons, e.g delivering a donated 4x4 recently, and getting institutions there to use OpenTimestamps. Also, I like Ukraine. It's a nice, cheap, libertarian county with low taxes, low crime, and good weather (I like snow). If not for Russia trying to kill everyone it'd be awesome.
I've risked my life doing a lot of dangerous things for fun. Some risk for something worthwhile is perfectly acceptable.
Anyway, Germany is free to send them back. Ukraine would rather have their productive refugees back, especially the men. Send them back with some Taurus cruise missiles while you're at it, and you won't have to deal with them again.
At the moment Russia is trying hard to make Ukrainian cities completely unlivable by destroying the electricity grid, along with water and heating. If Russia succeeds, you're going to have tens of millions of Ukrainians that realistically are going to end up on the EU whether you want it or not. So if you don't, make sure Russia loses.
The Polish government makes a big profit from their Ukrainian refugees, as they pay a lot more in taxes than they cost.
Germany doesn't release those figures. But they're most likely profiting as well. Ukrainians are competent, white Christians; this shouldn't be surprising.
If you want to complain, complain about all the third world "refugees" in your country.
These days know how to incinerate practically anything without significant air pollution. Countries like Switzerland incinerate essentially 100% of their non-recycled trash.
Air quality is an easy one to solve: we're damn good at building incinerators. Costs more money. But we can certainly do it.
CO2 is a real problem. But it's not a very significant one compared to other fossil fuel uses. And as we eventually get more and more plant-derived plastics, that'll close the loop and make CO2 irrelevant.