Could Portugal ever run entirely on green energy again?

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. See full Article.