In another similar situation as above, Stirling Energy Systems have also manage to prove the idea of concentrating the suns' rays into the combustion chamber of a Stirling engine driving an electricity generator.
It is estimated that eleven square miles of it can provide as much energy as the Hoover Dam. That would be amazing news as countries finally have a cheaper and more Eco-friendly power source instead of relying on making hydro dam where a large part of nature needed to be sacrifice to power it.
Energy Recovery, is the company that own the world's first osmotic power plant. It's purpose is to reverse the desalination pressure exchangers and harvest energy from it. Currently it is not fully functional yet but when it is proven to be successful, it can provide enough energy to satisfy 50% of Europe. Our world is covered 70% in water and around 95% of the water are sea water. So if we are able to use the entire ocean to produce energy, we would have enough for generations to come.