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Unit 8
Natural Resources
| Term | Definition |
|---|---|
| natural resource | anything from nature that people can use |
| renewable resource | a resource that can be replaced within a reasonable amount of time |
| nonrenewable resource | a resource that, once used, cannot be replaced in a reasonable amount of time |
| geothermal energy | a type of energy produced naturally beneath Earth's surface |
| hydroelectric energy | energy produced by using the mechanical energy of falling water |
| biofuel | a fuel produced by biological materials, such as wood |
| pollution | any waste product or contamination that harms or dirties an ecosystem and harms organisms |
| conservation | the process of preserving and protecting an ecosystem or a resource |