Could Portugal ever run entirely on green energy again?
The waters off the coast of Peniche are home to Portugal's latest green initiative
Portugal is a world leader in renewable energy. More than half its energy comes from wind, solar and hydro power. But as the country struggles through a record recession will their sustainability drive ground to a halt?
For a few glorious hours at the end of 2011, Portugal's entire energy needs were met by renewable sources of energy.
They have the world's largest solar farm, Europe's largest wind farm and extensive hydro-electric dam infrastructure.
And in the Atlantic waters off the coast of Peniche, 62 miles (100km) north of Lisbon, scientists hope to achieve another first in sustainability.
Finnish energy company AW Energy is days from fixing its WaveRoller machine to the ocean floor.
Three fibreglass panels, 100 sq m (1,076 sq ft) each in size, will swing back and forth with the motion of the waves on hinges attached to control stations anchored to the ocean floor.
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