In pictures: 11 eye-catching solar tech projects

From the world's largest solar furnace to a still that turns salt water into drinking water, the range of devices that harness the sun's energy is breathtaking. Here are some of our favourites

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Solar on the high seas The MS Tûranor PlanetSolar is the largest solar boat in the world. First launched in Germany in 2010, the catamaran spent the next two years circumnavigating the world, stopping in 28 countries along the way.

This 101-foot-long ship, which averages 5 knots (5.75 mph), travels with a four-person crew but can hold up to 60. The surface of the boat is covered with 5,554 square feet of solar cells.

Plans for the future include being used as a scientific platform for a deepwater expedition in the Gulf Stream, called PlanetSolar DeepWater. Because PlanetSolar does not release any pollutants into the water, the data gathered by the scientific team will not be skewed by gases, which can be emitted by non-solar boats.

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In pictures: 11 eye-catching solar tech projects

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