Question | Answer |
Megalopolises | Area where cities have grown so large they run into each other. |
Developing countries | Countries seeking to industrialize , but still wanting to follow traditional ways. |
Developed countries | The United States have long , been industrialized and can offer a higher standard of living. |
Deforestation | The clearing of Deforestation is one of the by-products of a growing world population. |
Habitats | Special environment required for particular organisms to live. |
Desertification | Organizing grasslands and overplanting fields leave the land exposed to erosion. |
Acid rain | Poisonous downpours have killed forest in both North America and Europe. |
Green house effect | The gases trap solar energy in the form of heat , the same way the nursery greenhouse dose. |
Chlorofluorocarbons (CFCs) , | the gases used in aerosols, air conditioning , refrigeration , and foam packaging , has also raised concern among scientist. |
The ozone hole | This hole starts to appear each August and reaches its largest size by October. |
The ozone layer | Absorbs most of the suns cancer - causing ultraviolet radiation. |
Sustainable development | Economic development that dose not limit the ability of future generation to meet their needs is known as sustainable development. |
Green revolution | Provided new strains of rice, corn, and other grains that have high yields. |
Subsistences farmers, | growing just enough food to meet their needs. |
Slums | The rundown , property-stricken portion of a city. |
Nonrenewable resources | Such as coal , petroleum, or natural gas. It takes millions of years to produce these fuels. |