If you care about the environment, nuclear is the only sustainable option at the moment. The plant costs have a very long time to recoup. Lots of plants built in the 80s seem perfectly capable of going until at least the 2050s without any danger and have requested license renewals to do exactly that. Each additional year further drives down the total cost of ownership.

I'll also note that people stupidly think only in terms of CO2. The truth is that a lot of the "forever" chemicals used in tho construction of wind an solar (along with loads of other toxic sludge) pose a much higher risk to the planet. If life on the planet starts getting killed off by the chemicals we spread everywhere, the temperature increases in a few hundred years don't matter in the slightest. We'll last way longer fighting CO2 than we will against the dangerous chemicals we're pumping out.