Air pollution from coal and oil is estimated to kill 5 million people every year. That’s more than every nuclear disaster combined, and not to mention the signifcant safety advances that have been made since those disasters.
All nuclear waste ever produced can fit in one football field. It’s stored in containers so thick you can go up and hug them safely, and so strong you can ram them with a train without doing significant damage. And if need be, we have the means to bury it deep underground.
Renewables are fine, but they don’t deliver consistently, so they need backup power. Nuclear provides that at much lower environmental cost than, say, giant lithium batteries.