| A | B |
|---|
| fossil fuels | coal, oil, and natural gas |
| subsistence farming | enough food to feed the family |
| natural resources | products of the earth |
| renewable resources | resources that can be replaced |
| nonrenewable resources | resources that cannot be replaced |
| solar energy | lproduced by heat of sun |
| tariff | tax added to price of imported good |
| hydroelectric power | energy produced by falling water |
| developing countries | working towards industrialization |
| free trade | goods flow freely among countries |
