| A | B |
|---|
| natural resource | anything from the natural environment that people use to meet their needs |
| renewable resources | resources that can be replaced as they are used up |
| nonrenewable resources | metals and other minerals that cannot be replaced |
| fossil fuels | nonrenewable mineral resource - coal, oil, natural gas - formed in the earth's crust from plant and animal remains |
| hydroelectric power | electric power generated by falling water |
| solar energy | power produced by the heat of the sun |
| subsistence farming | farmers grow only enough food to feed their own families |
| developing countries | countries that are working toward industrialization |
| free trade | taking down barriers so that good flow freely between countries |
| solar energy | produced by the heat of the sun |
| tariff | tax that is added to the price of imported goods |
| hydroelectric power | energy generated by falling water |
| developed countries | countries that are industrialized |
| quota | limit on how many items of a particular product can be imported from a particular country |
| import | buying a product from another country |
| export | selling or trading a product to another country |
| commercial farming | growing food for sale in markets |
| nuclear power | power made by creating a controlled atomic reaction |
