Energy from the Seas from Pelamis Wave Power

"...  potential to be one of the most environmentally benign forms of electricity generation ... wave energy around the British Isles ... estimated to be equivalent to three times current UK electricity demand, ..."

The oceans and the power of the waves and tides waves might be the source of your electricity someday.  Systems that can convert the constant undulation of the waves into energy can harness  what seems like an unlimited renewable energy source.

Pelamis  are minimally impactful ... their visual impact is small as they are half submerged so are not nearly as visibly on the horizon as wind turbines.  They appear to have minimal impact on marine life as well and can be removed much easier than a wind turbine.
They currently have installations undergoing tests in Portugal and Scotland. 

 Pelamis has their HQ in Edinburgh, Scotland.



Via:  Pelamis Wave Power  LINK

Minesto's Deep Green Tidal Power

"Minesto contributes a solution to the worldwide energy demand by offering a unique technology that explores the vast, renewable and abundant ocean power resource."

" ... new concept for tidal power plants called Deep Green. ... based on a fundamentally new principle for electricity generation from tidal currents. ... is applicable in areas where no other known technology can operate cost effectively due to its unique ability to operate in low velocities...."

Via:  Minersto  LINK