Energy from Waves!
We can produce a lot of electric power from alternative sources of energy. On of these sources can be found in the waves! Portugal realized that and built Agucadoura, the world's first wave farm off its coast. There are three Wave Energy Converters generating a total of 2.25MW.
The elongated metal contraptions bob up and down with the waves, while internal pistons, attached to the sea floor, remain stationary and pump hydraulic fluid. All this mechanic arsenal drives electric generators. The electric power is brought ashore by underwater electrical cables. The wave farm is now tapping into enough constant, renewable energy to power 1500 homes.
Who knew there was so much power in the ocean waves? Imagine what we can do with many of these farms all over the oceans. But it seems there is no interest in this at this time. I hope in the near future generators such these will be one of the clean alternative for an energy-starved planet.