| A | B |
|---|
| natural resource | any useful material from the environment that humans use to survive |
| raw material | a resourse that is still in its natural state |
| recyclable resource | a resource that cycles through natural processes |
| 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 coungtry with relatively low industrial production |
| commercial farming | farming that is done by companies |
| subsistgence 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 and trees |
| habitat | the area in whidh a plan 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 |
