Green House Co Ltd is to release an LED lantern"GH-LED10WBW," that generates electricity with water and salt in mid-September 2012.   The lantern emits light when water and salt are put in the lantern, so it  does not require a dry cell or rechargeable battery. It can continuously generate electricity for eight hours per charge of water. To use the LED lantern, 350ml of saline water containing 16g of salt is made by using a dedicated water bag. When the saline water is put in the lantern, it functions as an electrolyte with a magnesium (Mg) ro...