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Environmental Challenges

Megalopolis Areas where cities have grown so large they run into each other
Developing country Countries seeking to industrialize, but still wanting to follow traditional ways
Developed countries Like the U.S., have long been industrialized and can offer a higher standard of living
Standard of Living The measure of a persons's wealth and personal well-being
Deforestation The clearing of forests
Habitat The special environments required for particular organisms to live
Desertification The turning of fertile land into desert
Droughts Long periods without rain
Subsistence farmers People who grow just enough food to meet their needs
Slums The rundown, poverty-stricken portions of a city
Nonrenewable resource Fuels that take millions of years to produce, when they run out, they will be gone forever
Acid rain Poisonous downpours
Greenhouse effect Gases that trap solar energy in the form of heat, the same way that a nursery greenhouse does
Chlorofluorocarbons (CFC's) The gases used in aerosols, air conditioning, refrigerators, and foam packaging, has also raised concern among scientists
Ozone layer A thin, protective layer of gas in the upper atmosphere
Ozone hole Seasonal reduction of ozone over Antarctica
Sustainable development Economic development that does not limit the ability of future generations to meet their needs
Green Revolution A solution to feeding the world's population