There is no cheaper and stable form of energy than solar energy. The only issue one faces is its efficiency of long-term storage. Scientists from the Chalmers University of Technology, Sweden has developed a specialized fluid, called a solar thermal fuel that can store energy from the sun for well over a decade. The fluid is actually a single molecule that has been composed of carbon, hydrogen, and nitrogen. A prototype of the energy system made up of a concave reflector with a pipe in the centre has been placed on the roof of a university building. When the energy is needed, the fluid is simply drawn through a catalyst that returns the molecule to its original form, releasing energy in the form of heat. This energy can be used for household purposes including powering devices such as hair dryer, an iron, water heater, air conditioner and many more. The experimentalists have picking up heat and dropping it off without significant damage to the molecule more than 125 times.

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