| A | B |
|---|
| nonrenewable resource | natural resource that is used more quickly than it can be formed |
| renewable resource | resource that replenishes itself quickly enough so that it will not be used faster than in can be produced |
| ecological footprint | amount of land necessary to produce and maintain enough food, water, shelter, energy, and waste |
| pollution | anything that is added to the environment and has a negative effect on the environment or its organisms |
| smog | air pollution in which gases released from burning fossil fuels form a fog when they react with sunlight |
| particulate | microscopic bits of dust, metal, and unburned fuel produced by industrial processes |
| acid rain | precipitation produced when pollutants in the atmosphere cause the pH of rain to decrease |
| greenhouse effect | normal warming effect produced when gases, such as carbon dioxide and methane, trap heat in Earth's atmosphere |
| global warming | worldwide trend of increasing average temperatures |
| indicator species | species whose presence in an ecosystem gives clues about the condition of that ecosystem |
| biomagnification | condition of toxic substances being more concentrated in tissues of organisms higher on the food chain than ones lower in the food chain |
| habitat fragmentation | process by which part of an organism's preferred habitat range becomes inaccesible |
| introduced species | species that is not native and was brought to an area as a result of human activities |
| sustainable development | practice of not using natural resource more quickly than they can be replenished |
| umbrella species | species whose being protected under the Endangered Specie Act leads to the preservation of its habitat and all of the other organisms in its community |
