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SC 7-7.7
SC 7-7.7 Environmental Challenges
| TERM | DEFINITION |
|---|---|
| megalopolis | areas where cities have grown so large they run into each other |
| developing country | countries seeking to industralize, but still wanting to follow traditional ways |
| developed country | countries that have long been industrialized and can offer a higher standard of living |
| deforestation | the clearing of forests |
| habitat | the special environments required for paticular organisms to live |
| desertification | the turning of fertile land into desert |
| subsistence farmers | farmers which grow just enough food to meet their individual family's needs |
| slum | the rundown, poverty-stricken portions of a city |
| nonrenewable resource | resources such as coal, petroleum, and natural gas that take millions of years to produce. When these resources run out they will be gone forever. |
| acid rain | sulfur gas produced by factories mixes with the moisture in the air. Some poisonous downpours have killed forests in both North America and Europe. |
| greenhouse effect | The emission of carbon dioxide and other gases from factories and gas-burning vehicles that trap solar energy in the form of heat at the Earth's surface |
| chlorofluorocarbons (CFCs) | gases used in aerosols, air conditioning, refrigerators, and foam packaging that scientists warn can destroy the ozone layer |
| ozone layer | a thin protective layer of gas in the upper atmosphere which absorbs most of the sun's cancer-causing ultraviolet radiation and is essential for human life |
| ozone hole | a seasonal reduction or weakening of the ozone over Antarctica that starts to appear each August and reaches its largest size by October. In recent years the hole has begun to shrink |
| sustainable development | Economic development that does not limit the ability of future generations to meet their needs |
| Green Revolution | In the 1970's, declard as a solution to feeding the world's population by providing new strains of rice, corn, and other grains that had higher yields |
| "GOING GREEN" | way of life that reduces our "carbon foot-print" (effect on the environment by using sustainable food, products, and employing the philosophy "reduce, reuse, recycle" |
Created by:
mhardy
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