Russia's whole economy relies on green house gas production, so much for the climate. It's really easy to say you should capitulate to a foreign military invasion when you aren't the one being sacrificed. Russia wanted control of Ukraine, and every place they lost when the USSR collapsed. Making it clear his goals are to annex land from other nations he sees as part of their lost empire. If you don't believe me Putin keeps saying things like how annexing lost land isn't invasion, it's reclamation, then uses the Peter the Great's similar justification for expanding their empire into Sweden centuries ago, how it's just reclaiming their god given lands, like on the 350th anniversary of the event, in a speech defending his invasion of Ukraine, which undermines the veracity of how threatened they felt in this situation, or how that was why they invaded Ukraine. He rambles on about it so much he even went on an tangent about it in a meeting with an organization of young Russia entrepreneurs who were still in university. NATO and the EU, also acting in their self interest, wanted Ukraine to favor trade, and defense pacts with them instead. So there has been a proxy war between them, in Ukraine, and guess what? Russia lost. So, unwilling to accept a cold defeat, and going with the concept that they have a god given right to Ukraine, they fired up the military again, and went in for a full invasion this time, with a bunch of BS excuses, like de-nazification, as they sent in a PMC ran by nazis, to accomplish this task.
Neither actor in this is operating for some sort of altruistic reason, Ukrainian oligarchs are pursuing who they think they can use to enrich themselves the most with, and the Ukrainian people are stuck between two forces they are much smaller than, who are fighting over their homeland. You give favor to one empire in this situation (and you acknowledge that is what they are, and what they are doing), the one who has used it's military to slaughter 150 thousand, or more, innocent people, because you believe it will be the best option for you. You are both acting in self interest on top of the lives lost, because "just giving" Russia Ukraine is just that, sacrificing the lives of those who's home they are invading, and falling for the falsehood that trying to appease imperialists will make them stop waging wars, taking land, and slaughtering people in the process, thus supporting endless war by giving the empirical power what they want, more empire, thus justifying use of military force, because it results in more empire. You are doing is with the thin veneer of an excuse that is b-b-but the environment, ignoring how, by your own ideas of a utilitarian perspective, that it's actually best to allow Ukraine to align more with the west, because it was Russia that sent the military killing machine in, while NATO was sticking to routes far, far, less damaging to the environment, and human life.
And you call me insane?