The only solution is a mixture of all sources...and that includes fossil fuels. The idea that WE can change climate is absurd. Mad scientists they are.
The reality is that we shall be relying on hydrocarbon fuels for decades, if not centuries, into the future. As a storage medium for energy, it is hard to beat.
Now if you want hydrogen, in great quantity, then beginning with coal, make coke from it by heating in a retort in the absence of oxygen. The volatiles driven off range from tar to methane, and only the carbon remains. Ignite the coke with an oxygen supply until the embers reach a steady temperature above 1,000 degrees, then introduce an atomized water spray. The temperature will dip a little, but the water in combination with the carbon of the coke forms carbon monoxide, an excellent fuel in its own right, and free hydrogen, which is much lighter than the carbon monoxide, and may be separated by perhaps some osmotic process. The remaining carbon monoxide is piped off to be burned, forming carbon dioxide, and the heat energy used to generate electricity. the whole concept behind “clean coal”.
No fly ash, no mercury, no volatiles, which were cooked off earlier.
https://energyeducation.ca/encyclopedia/Town_gas
Another method, which uses waste and organic trash, is the Plasma Trash Reduction system. The trash material is shredded into very small granules, and fed into a plasma arc within a closed retort, in the absence of oxygen. The plasma torch, ignited by an outside source of electricity, then generates temperatures nearly that of the surface of the sun, some 33,000 degrees F. The waste stream is dropped into this plasma torch, stripping the external electrons of every element that falls through it, reducing the elements to their ions. Free hydrogen and carbon monoxide are the primary products of this plasma incineration, and the ions of every other element then fall to the bottom of the retort, as a white-hot slag, which is drained off on a continuous basis. The hydrogen and carbon monoxide is then used as a fuel to generate electricity on-site, about six times the amount necessary to ignite and maintain the plasma arc. Not exactly fusion energy, but certainly on a par with direct application of solar energy.
https://www.explainthatstuff.com/plasma-arc-recycling.html
As a sort of “new technology” in the 1950’s and 1960’s, uranium-fueled light water reactor power generation plants were funded and built relatively close to industry and residential user locations. These nuclear power plants could run 24/7/365 at flat-out maximum output for YEARS before needing refueling, but this meant that “spent” uranium fuel rods, which still retained about 97% of residual power, had to be removed and either reprocessed, or kept in storage for periods ranging up to something like 10,000 years before the residual radioactivity died down.
Enter several technical and engineering advances, making it possible to use thorium, a much more available and stable nuclear fuel, to build thorium-fueled molten salt nuclear reactors, which can also run 24/7/365 flat-out full maximum for years, but are inherently much safer, and also as important, can be scaled up or down in size to fit the locality. Because of the design, there is no possibility of having a meltdown that releases a large radioactive cloud, like the Chernobyl or Fukushima nuclear disasters. And perhaps even more important than any other reason for adoption, the “spent” uranium fuel rods must be used to initiate the thorium-fueled reaction which does not start spontaneously, eventually consuming most or all of the fuel rods now in storage, so the world does not have to wait 10,000 years for them to become relatively harmless.