Natural resources

The materials wich are supplied by the earth, that is, by nature, are called natural resources. Some natural resources can by used again and again. They are called renewable resources. Other natural resources can be used only once. They are called non-renewable resources.
Some areas of the earth have been supplied with a lot of certain natural resources. Others have few natural resources, or perhaps none at all. Japan, for example, imports iron sand from Indonesia, because this county does not have enough iron one for industry. If country has few natural resources, it will have import materials from other countries.
Among our natural resources are fuels such as coal and oil. Precious mineral such as gold and silver are natural resources, too. Copper is a natural resource. The minerals we use come from inside of the earth. Gold, silver, and copper are minerals. The salt we use to flavour our food is natural resource. Our food, too, for example rice, is supplied by nature.
The important parts of the earth's surface provide many of natural resources. For example, we get our water flom lakes and streams. Water is a natural resource. We get wood from our forests. Wood is natural resource.
Air, too, is a natural resource. In fact, it is one of our most important natural resources. We'll die without enough air to breathe. In some cithes the air has become polluted because cars and other motor vehicles emit gas that mixes with the air. Steps are now being taken to make the air clean and to keep it clean.