what is an abundant energy source that has not been harnessed?

Answer 1

tidal- can't think of any place outside of research that uses this energy.

geothermal- Iceland is the only place I know of that really harnesses geothermal energy.

Answer 2

solar. we're just scratching the surface, if that. you could build huge solar power plants (there is an EUR 250 million project in Spain)

geothermal

tides. There are a few installations here and there in the world to use energy from tides, but more could be done. Of course the issue is that such installations typically wreak havoc on the local ecosystem, so not ideal.

wind is use here and there, but energy density is quite low and cost is high so it is very unlikely that it will resolve our basic issue of energy supply. Not to mention tornadoes or hurricanes, which are very localised and don't last long, so couldn't be exploited

whoever suggested lightning is mistaken. Evfen the most powerful lightnings contain as much energy as a few seconds of output of your average nuclear power plant. Not to mention the fact that you'd have to be able to tell where and when they'll strike.

Answer 3

All power sources that we know how to harness have been harnessed. Fusion power is abundant and has not been harnesses, but not for lack of trying. Many billions of dollars have been spent trying to harness it. Compared to fusion power, all other power sources seem scarce and weak.

Answer 4

Lightning. Hurricane winds. Gulf stream motion. Tornado winds.

Answer 5

sun is an infinite source of energy if we could some how capture it in outer space

Answer 6

The motion in ocean waves.

Answer 7

How about hardly harnessed:wind, solar, nuclear.