Drilling through the Earth to reach areas hot enough to create steam is possible, but very expensive and difficult.
Alternative sources of energy: solar, geothermal, wind, biofuels, tidal, urban wastes, etc; but they cannot replace uranium.
Strictly speaking geothermal energy is not renewable as we can't grow or make new energy to replace it. It is however essentially inexhaustible as it is renewed by processes like radioactive decay and tidal friction in the magma.
Alternatives are wind, solar, geothermal, hydro, tidal. But I doubt if any or all of these can replace nuclear, at least in industrial countries like the US and Europe.
By heating the Earth. - Geothermal energy is replenished gradually, through the decay of heavy atoms (like uranium, for example), in the Earth's interior. However, over billions of years, this will gradually decrease, as less and less atoms remain.
If the converter is defective there is no alternative. You must replace it.
Alternate energies as solar, eolian, geothermal, etc. cannot replace nuclear energy.
it is way better than fossil fuels
Gatorade is formulated to replace lost electrolytes and it tastes great. However, if you are looking for a cheaper alternative you can drink good old fashioned pickle juice.
Yes and no. It would only be able to replace some electricity. it would replace solar electricity and thermal but not water.
Shallots, a member of the garlic family
There is nothing whatsoever to stop you from using what ever in your jugement is a viable alternative pool sanitizing system.
It means there is no alternative energy source that can ween humanity off of fossil fuels. Which is presently true, however, given almost every developed nation is pooling their resources to replace fossil fuels, that isn't a timeless answer. Before the latter half of this century, gasoline and every other form, will or begin to exist only in history.