| Term | Definition |
|---|
| ecosystem | all of the living and nonliving elements in a particular place |
| community | all of the animals and plants living in one area within an ecosystem |
| succession | the gradual repopulation of a community by different species over a period of time |
| hydroelectric power | the energy of moving water converted to electricity |
| fossil fuels | any fuels formed from the remains of ancient plant and animal life |
| nonrenewable resources | any resources that are used faster than they can be replacec |
| geothermal energy | the energy dreawn from heated water within the earths crust |
| pollution | the contamination of the air, water or soil |
| global warming | an increase in earths temperature due to an increase in greenhouse gases |
| eutrophication | increase in the amount of nutrients, such as nitrates in an environment |
| recycling | the process of breaking down discarded material for reuse in other products |
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