I live near a nuclear plant. So near that I directly see it when I open my windows in the morning. I don't know what definition you give to 'cleaner' but if you walk around a nuclear plant there is nothing clean. The lands are filled with potentially radioactive garbages. They have already done some dumping in a wild river and garbages are stored because they don't know how to get rid of it. At worst, the radioactive material is buried underground.
And I live in a country supposed to be one of the most advanced in nuclear technology. It is the worst energy to use and it's not a matter of pollution and ecology, it's a matter of safety.
Green energy is a marketing trick to fool people. So many companies are proud to show on their website "green energy" while in reality, they use something like 10% of green energy (sun, wind, water,...) And do you think when you want to watch a show, your TV can make a difference between coal, nuclear, sun? Nope.
All the stuff with solar panels, wind turbines ect pollute at least at the same level as coal. Yes, coal pollutes, but if people could stop giving birth like rats...
As someone mentioned with gas, the crisis started well before the war. Especially in Europe since some of us are too dependent on it.
I did not suffer the oil crisis of 1973, but we could experience it again. The world can live without Russia's production because there are several countries that can replace Russia. The point is, it will have a cost and some countries won't be able to afford it