OIL: The End Will Be Sooner Than You Think
Forget about hot fusion, cold fusion is making a comeback.
As for the topic. We have an ocean full of deuterium and hydrogen... We have thorium in plenty. We have technology coming up with actual transmutation of elements all while releasing abundant energy in the process (a complex one but workable). Then there's the sun.
People also seem to forget that we also have a nuclear fission reactor beneath our feet that is limitless in energy production via geothermal means, all while sequestering carbon emissions by storing excess carbon capture from nearby coal plants to store underground until the stuff turns into limestone. Speaking of which, if you look up the LCOE of geothermal as compared to other renewables, then geothermal will almost always have an absolute advantage over any other renewable source, and it also beats non-renewables too like coal, gas, and nuclear. Hell, Yellowstone could potentially power the entire US if we wanted to, providing some serious non-stop power without carbon emissions and other positive externalities like promoting public awareness on the impending disaster of a Yellowstone eruption. Anyone?
It's really a lack of funding and current lobbying and governmental ineptitude really holding us back. India and China are ahead in terms of planning for a cleaner future; but, I don't believe that much in social planning unless you can wipe out a population and start from anew. Tesla, Panasonic, graphene batteries, and supercapacitors, better energy storage, less transmission waste for energy intensive industries, more localized energy production for homes and less energy intensive utility, seem to be the future. There's also natural gas as mentioned, which if things go sour then current vehicles can be retrofitted with LPG gas as they do in Europe and elsewhere.