| A | B |
|---|
| conservation | use resources wisely so they last longer |
| acid raid | pollutants in air mix with rain and fall to earth |
| ozone | substance in atmosphere that blocks UV radiation |
| global warming | caused by the greenhouse effect |
| recycle | to reuse precious resources more than one time |
| coastal erosion | partially caused by melting ice caps |
| contour farming | conserves soil by plowing across slopes |
| terracing | conserves soil by flattening hillsides |
| Earth Day | began in April of 1970 |
| pollution | can make air, water, soil, and oceans unhealthy of unuseable |
| Three Mile Island | PA nuclear plant damaged in 1979 |
| Chernobyl | Ukranian nuclear plant that exploded in 1985 |
| greenhouse effect | certain gases in atmosphere trap heat radiation |
| endangered species | plants or animals on the verge of extinction due to pollution and habitat loss |
| extinction | whan a plant of animal species ceases to exist |
| CFC | chloroflourocarbon - one of the ozone destroying chemicals |
| greenhouse gases | include carbon dioxide and methane |
| overfishing | has drastically reduces seafood supply in parts of the world |
| rainforest destruction | could reduce world's oxygen supply |
| flood control dams | can reduce silt supplies to downstream areas |
