Hydroelectric power is not feasible for all areas, just like wind-driven turbine generators are not feasible for all areas. Fuel cells for vehicles (cars, trucks, buses, etc) and maglev for trains is probably the future of transportation; for ocean-bound transportation it will probably still be internal combustion. Fusion power would be the most ideal, but that is still one of the "Holy Grails" of physics; after almost 20 years no one has maintained a self-sufficient fusion reaction, either by tokomak (circluar-magnet-contained plasma) or laser-induced. Solar power is the most practical and most realistic, because the technology for that is here now.
Core samples from various parts of the world show that global temperature has a regular cycle; we are actually on the downhill side of a cycle, heading towards another Ice Age. In the long run, it will get colder before it gets warmer....
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Everything may be explained by a conspiracy theory. All conspiracy theories are true.
No matter how thinly you slice it, it's still bologna.
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