Steel is produced from mined iron ore and consumes a great deal of precious energy and water in the original production process. Fortunately, this lightweight and malleable material can be recycled indefinitely without downcycling, so there's no excuse for dumping an old steel can in the trash. Recycling a tonne of steel keeps 1.5 tonnes of iron ore in the mine and saves 40% of the water and 75% of the energy used to make virgin steel. In the past, tin was stripped from steel and recycled separately, now the small amount of tin and steel tends to be recycled together as an alloy.