The search for green energy sources motivates people to create genious solutions. Checkout the Pentland Firth sea turbine tidal power plant in construction by MeyGen.
I am happy to know that there is an effort happening to harvest this energy source.
I call it green energy as it doesn’t emit CO2. But I hesitated to call it renewable energy though, because, you know, tidal waves are powered by moon momentum, which is finally not renewable.
Question to physicists/astronomers: by slowing down tidal waves, what is the effect on moon momentum:
- Slowing down tidal waves reduces the strain the waves create on the moon. The moon looses less kinetic energy, it slows down less than without.
- Taking energy out of tides takes kinetic energy from the moon. It slows down.
But who said the sun is renewable. So I think I should stop nitpicking terms and just accept that “renewable energy” is a good layman term.