Recycling metals

When there is no use for a metal, the metal can be melted down and made into something new so it can be used again. The metal is recycled. There are benefits of recycling metals:
 * Metals last longer, because they keep being reused.
 * There would be less minds, which helps the environment, because mining causes dust, noise pollution, and damage to landscapes.
 * Produces less pollution. Extraction some metal ores (such as lead) can produce sulfur dioxide. This does not happen when the metal is recycled.
 * Less land is needed for landfill sites.
 * Carbon dioxide is emitted when fossil fueld are used to heat ores or to generate electricity the electricity used in electrolysis. By recycling less carbon dioxide is emitted, this is good because it is a green house gas
 * For most metals, it takes less energy energy to melt down used metals than it does to extract the metal from its ore. This makes some recycled metals more sustainable and cheaper.

Uses of metals
All metals conduct heat and electricity. They are malleable (can be hammered into shape) and ductile ( can be stretched into wires). Not all metals have exactly the same properties. The uses of a particular metal depends on its propeties.