| A | B |
|---|
| Precipitation that is more acidic than normal | acid rain |
| Phenomenon that occurs when cool air containing pollutants becomes trapped near the Earth’s surface under a layer of warm air | temperature inversion |
| Any waste that can cause death or serious damage to human health; poisonous, chemical waste | hazardous waste |
| Increase in temperature caused when cold water used to cool reactors in nuclear power plants is heated and discharged back into lakes and rivers | thermal pollution |
| Release into the environment of substances that change the environment for the worse | pollution |
| A person who studies the relationships among living things and their environment | ecologist |
| The time it takes for half the substance to decay, or change into a non-radioactive substance | half-life |
| Form of conservation in which discarded materials that can be used again are separated and sent to factories where they are reclaimed | recycling |
| Thick brownish haze formed when hydrocarbons, carbon monoxide, and other gases react in sunlight | smog |
| Waste produced by the production of energy in nuclear power plants | radioactive waste |
| Wise use of natural resources so they will not be used up too quickly or used in a way that will damage the environment | conservation |
