If we didn't stop building plants 3 decades ago, you wouldn't have to worry. Anyway, USSR was building new plants in 3-5 years, I'm pretty sure we could get by for a decade more it would take to make 100% generated energy without burning fossil fuels.
And if NASA had kept its funding after the moon landings we would have a base on Mars now. But we don't. We have to make do with what we can achieve within the society we live in. Not compare our world to some alternative history.
If tou6 want to get out of a deep pit, first thing to do is to stop digging.
Humanity should stop those unbased fear-mongering against nuclear energy and start increasing the number of nuclear plants, encouraging the development of cheap, safe and reliable power generation technologies.
