Terms : Hide Images
| 6262978295 | air pollution | Concentration of trace substances such as carbon monoxide, sulfur oxide, hydrocarbons, and solid particulates, at a greater level than occurs in average air. |  | 0 |
| 6262978296 | primary pollutant | A pollutant that is put directly into the atmosphere by human or natural activity |  | 1 |
| 6262978297 | secondary pollutant | A pollutant that forms in the atmosphere by chemical reaction with primary pollutants, natural compenents of the air, or both | | 2 |
| 6262978298 | smog | air pollution by a mixture of smoke and fog |  | 3 |
| 6262978299 | temperature inversion | atmospheric condition in which warm air traps cooler air near the earth's surface |  | 4 |
| 6262978300 | sick building syndrome | a condition in which the majority of a building's occupants experience certain symptoms that vary with the amount of time spent in the building without being able to identify a specified cause of illness |  | 5 |
| 6262978301 | asbestos | a term for several minerals that have the form of small elongated particles. Some types of particles are believed to be carcinogenic or to carry with them carcinogenic materials |  | 6 |
| 6262978302 | decibel | a logarithmic unit of sound intensity |  | 7 |
| 6262978303 | acid precipitation | rain, sleet, or snow that contains a high concentration of acids |  | 8 |
| 6262978304 | pH | The pH scale measures how acidic or basic a substance is. |  | 9 |
| 6262978305 | acid shock | A rapid change in a body of water's acidity is called |  | 10 |
| 6262978306 | ozone | gas that absorbs ultraviolet solar radiation, found in the stratosphere, a zone between 15 and 50 kilometers (9 to 30 miles) above Earth's surface. |  | 11 |
| 6262978307 | coal | a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. |  | 12 |
| 6262978308 | sulfur dioxide | colorless and odorless; released in industrial processing like burning fossil fuels. It is a major contributor to acid rain. Emissions have been reduced since the 1970s |  | 13 |
| 6262978309 | El Nino | A weather pattern created by the warming of the waters off the west coast of South America, which pushes warm waters and heavy rains toward the Americas and produces drought conditions in Australia and Asia. |  | 14 |
| 6262978310 | La Nina | Unusual cooling of the surface water in the eastern Pacific Ocean near the equator. Affect weather patterns |  | 15 |
| 6262978311 | latitude | Distance north or south of the equator |  | 16 |
| 6262978312 | topography | A description of surface features of land. |  | 17 |
| 6262978313 | CFC's | Chlorinated Fluorocarbons are chemicals that break down the ozone layer |  | 18 |
| 6262978314 | global warming | An increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes) |  | 19 |
| 6262978315 | greenhouse effect | Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases |  | 20 |
| 6262978316 | Kyoto Protocol | Agreement among 150 nations requiring greenhouse gas emission reduction. |  | 21 |
