1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:Where do most of the world's trees...What resources are used to build a...Why is there lots of heavy industr...How do ore deposits form?How do we get power from flowing w...How is iron obtained from its ore?*How does coal form?*What is carbon used for?What is a renewable resource?What is recycling?What is petroleum? How does coal form? If the wood of an ancient forest is buried and compressed for millions of years, its carbon increases. This produces coal, an impure form of carbon, which can be used as fuel. The mining of coal has been crucial to industry   Previous: Back Book: 1001 Section: Earth Chapter: Resources