I'm going to block everyone repeating the climate denialist mantra "we can't abandon fossil fuels and switch to renewables overnight."
The transition to renewables was supposed to begin in the early 1970s when climate change was acknowledged as scientific consensus.
It's been about 20000 overnights since then. How many more overnights do you need? I expect the exact number in the answer, otherwise you're just a climate denial bot to me.