| A | B |
|---|
| pollution | the presence of harmful substances in teh enviornment |
| renewable resources | a natural resource that can be used and replaced over a relatively short time |
| nonrenewable resources | a natural resource that cannot be replaced or that can be replaced only over thousands or millions of years |
| overpopulation | a condition that occurs when the number of individuals becomes so large that there are not enough resources for all individuals |
| biodiversity | the number and variety of living things |
| biodegradable | capable of being broken down by the environment |
| conservation | the wise use of and preservation of natural resources |
| recylcling | the process of making new products from reprocessed used products |
| resource recovery | the proces of transforming into useable products things normally thrown away |
