Aluminum is one of the only elements that can be reworked without changing the integrity of the metal. Its low melting point and crystalline structure make the transition from solid to liquid a fairly simply procedure that requires less energy than producing and smelting other metals. Secondary aluminum uses five percent of the energy required to produce primary aluminum. It takes an aluminum can less than 60 days to be back on the shelf, and sixty to seventy percent of all automotive aluminum is sourced from recycled metal, saving valuable natural resources and landfill capacity. Recycling is an important part of the consumer psyche, and valued by artists and industry for aesthetic, political, economical, and social reasons.