Yeah, hopefully nuclear fusion power will come along and save our world. Otherwise, I doubt you can make an install enough solar panels and wind machines to power modern society.
Sure you could.
Oh, it would take time, of course. It can’t be done on the timetable that Greens would like for us to avoid the likely increase in global temperatures of about 2.7 degrees. But it’s certainly technologically feasible to build an electric grid that combined dispatchable non-fossil sources (nuclear and hydro) with renewables like solar and wind to power modern society, over the next fifty to seventy years.
You’d probably need to build a lot more nuclear than we have…but notice how quickly political resistance to nuclear energy fades in the face of actual energy scarcity? Sure, fusion would be nice - as would a step-change improvement in energy storage, which could do the same thing for dispatchable power. But we don’t need any improvement in energy technology from what we have now to keep modern society humming through a transition away from fossil fuels over the very long amount of time that we have available to us to do so (if we want). Long before we start running out of oil and gas, we can have the nuclear infrastructure (plus renewables) to keep us going swimmingly. We’re not limited by natural resource scarcity - only our choices.
Albaby