Hydro is great, so great that around 90% of dammable rivers are already used for power generation. Further hydro generation is not really possible so it will never fulfill more than a fraction of energy needs.
Wind is an excellent source for some countries. Much of the US is great for wind generation and unlike hydro the resource is largely untapped. Wind is unpredictable but averages out over large areas. It will never be a base source but has much potential remaining.
Solar is held back by cost alone. All predictions point to solar providing the majority of our electricity in the future.
Nuclear fuel is essentially unlimited. Uranium is in seawater and if prices rise high enough we can extract from that and basically never run out. On top of that thorium is also usable as fuel if we ever get around to building anything that uses it.
In some countries the best power source is nuclear. If you don't have a lot of wind, water, or sun, your options become limited to fossil fuel or nuclear.
Wind is an excellent source for some countries. Much of the US is great for wind generation and unlike hydro the resource is largely untapped. Wind is unpredictable but averages out over large areas. It will never be a base source but has much potential remaining.
Solar is held back by cost alone. All predictions point to solar providing the majority of our electricity in the future.
Nuclear fuel is essentially unlimited. Uranium is in seawater and if prices rise high enough we can extract from that and basically never run out. On top of that thorium is also usable as fuel if we ever get around to building anything that uses it.
In some countries the best power source is nuclear. If you don't have a lot of wind, water, or sun, your options become limited to fossil fuel or nuclear.