| A | B |
|---|
| natural resource | any useful material from the environment that humans use to survive. |
| raw material | a resource that is still in its natural state. |
| recycable resource | a resource that cycles through a natural process in the environment. |
| renewable resource | a natural resource that the environment replaces as it is used. |
| nonrenewable resource | a resource that cannot be replaced once it is used. |
| fossil fuel | a resource created from the remains of plants and animals. |
| manufacturing | The process of turning a raw material into a finished product. |
| developed nation | a modern industrial society with a well-developed economy. |
| developing nation | a country with relatively low industrial production. |
| commercial farming | farming that is done by companies. |
| subsistence farming | farming that provides only enough food for a family or village. |
| plantation | a large estate on which crops are grown by workers living there. |
| foreign aid | economic and military aid to another country. |
| ecosystem | a community of living things and its environment. |
| deforestation | The process of clearing land of forests or trees. |
| habitat | The area in which a plant or an animal naturally grows or lives. |
| acid rain | rain whose high level of chemicals can pollute the environment. |
| ozone layer | a layer of gas in the upper atmosphere that blocks most of the sun's harmful rays. |
| global warming | a slow increase in the Earth's temperature. |
| recycle | to reuse materials to make new products. |
