see also Solar Cooking Archive Wiki

Solar cooking is a method of using a solar cooker to make meals

One solar cooker can save 1,000 pounds of wood, 9,000,000 btus of energy, 170/37 trees, 102/925 tons of CO2 each year, 68,000/37 gallons of H2O, 5/132 tons of Al, gain almost 221/370 tons of O per year