| A | B |
|---|
| conservation | the preservation and wise use of natural resource. |
| renewable resources | a natural resource that can be replaced at the same rate at which it is consumed. |
| nonrenewable resources | a resource that forms at a rate that is much slower than the rate at which it is consumed. |
| green house effect | trapping of thermal energy in the atmosphere when solar energy that was absorbed by earth is re radiated into the atmosphere. |
| global warming | an increase in the worlds average tempature possibly caused in part by fossil fuel use. |
| glacier | a large bofy of ice moving slowly down a slope or valley or spreading outward on a land surface. |
| permafrost | a permanetley frozen layer at variable depth below the surface in frigid regions of a palnet. |
| fossil fuels | fuels such as coal,oil,and natural gas:formed over a million a years from the remains od anicient plants and animals. |
| pollution | anything in the envirment that is harmful to living things. |
| air pollution | contamination of the air with substances that can be harmful to living things. |
| acid rain | rain that has a lower pH than normal;caused by chemical air pollutants,combined with water vapor in the air;the most common pollutants are sulfur dioxide and nitrogen oxide. |
| biodegradeable | substances that will break down into simpler compounds when buried or exposed to sun,water or air. |
| smog | photochemical haze that forms when sunlight acts on industrial pollutants and burning fuels. |
| enviroment | surrounding and conditions in which in which an organism lives. |
