| A | B |
|---|
| renewable resource | a resource that can be replaced within a reasonably short time |
| nonrenewable resource | a resource that cannot be replaced after it is used |
| fossil fuel | a fuel that formed over many years from the remains of living organisms |
| groundwater | water from rain or snow that sinks into the earth and is stored there |
| air pollution | the addition of any unwanted substance into the air |
| pollutant | an unwanted substance added to the air, water, or land |
| carbon monoxide | a colorless, odorless, poisonous gas made up of carbon and oxygen |
| ozone | molecule of oxygen that contains three atoms of oxygen |
| acid rain | rain containing acids formed when air pollutants react with water vapor |
