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The Energy Tree is a large device in the desert for reserving rainwater resources and wind power resources seasonally. During the rainy season, the four leaves put the concave side upward for collecting rainwater with the largest size. The rainwater is filtered while flowing through the trunk part. Then the clean water is reserved at the bottom of “The Tree of Life” which is drinkable. During dry season, the three leaves on the side spin 90° clockwise and rotate around the trunk by the wind, which in turn transforms wind power to electric energy.