Scientists are warning that our planet is fast running out of many essential materials. Dwindling reserves of platinum, copper and phosphorous could create crises in the electronics, medical and farming worlds. There are fears that competition between countries for remaining deposits will result in 'resource wars'.
Materials scientist Mark Miodownik finds out how serious the situation has become and asks what scientists, politicians and economists can do to secure the earth's resources for future generations.
Mark Miodownik explores the dwindling supplies of a host of important metals.