Diatomite can also be used as a non-chemical insecticide, the sharp silica shells cut and shred the insects. A microcoating of gold on glass reflects solar energy and reduces the electrical demand of air conditioning. Limestone removes phosphorus and nitrogen, controls odor, kills bacteria, and aids in the clarification of waste water. Limestone will also neutralize acid rain and acid drainage. Lithium is used in high energy batteries for such things as computers and propulsion of electric cars.
Silver is used to kill bacteria in water purification systems.
Sulfur is used as a phosphor in low-energy lighting. The U.S. is now the world's leading producer of phosphate, fully providing for our own requirements and a small amount for export. Mineral elements provide the color in fireworks. Gold sparks are produced by iron filings and small pieces of charcoal. Bright flashes and loud bangs come from aluminum powder.