Good old water
Old ideas sometimes are very good: get your running water to turn the turbine you use to make electricity/flour, etc. Of course, not everywhere is this possible, but we can build up the water and then use its and gravity's force. Not bad, let us do more where we can and it does NOT ruin existing environment. Let us do this and not flood people's villages and farms or disturb local ecosystems.
Free standing turbines could then be the answer. There is at least one recently mentioned as built by OpenHydro, let us look at this more and more. Use the rivers, seas and oceans, why not, as long as they are not blocked up or the wildlife or ecosystem inhibited by the engineering.
The answer to climate change is of course not this alone, but it is convenient in helping on the way to tackling it properly.
(This topic will definitely be revisited.)
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