Sustainable Energy
1 / 12    

Are these the greenest countries in the world?

» more from Sustainable Energy

Energy from the wind, sunlight, tides and geothermal heat is fast becoming an increasingly major part of the world's energy mix -- as can be seen in the vast range of renewable energy projects taking place across the world, from China to the U.S.

CNBC's "Sustainable Energy" takes a look at a quarterly index from professional services firm EY, which ranks 40 countries "on the attractiveness of their renewable energy investment and deployment opportunities, based on a number of macro, energy market and technology-specific indicators."

Read on as we profile the top 10.

STR | AFP | Getty Images