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Environmental challenges

Megalopolis Areas where cities that are large and run into each other.
Developing countries Countries seeking to industrialize, but follow the traditional ways.
Developed countries Can offer a higher standard of living.
Deforestation One of the by-products of a growing world population.
Habitats Special environment requirements for particular organisms to live.
Desertification Turning fertile land into desert
Subsistence farmers farming that provides for the basic needs of the farmer without surpluses for marketing.
Slum A squalid and overcrowded urban street or district inhabited by very poor people.
Nonrenewable resource Minerals, fossil fuels, and other materials present in essentially fixed amounts (within human time scales) in our environment.
Acid rain Rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes.
Greenhouse effect The trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation...
chlorofluorocarbons Any of a class of compounds of carbon, hydrogen, chlorine, and fluorine, typically gases used chiefly in refrigerants and aerosol...
Ozone layer A layer in the earth's stratosphere at an altitude of about 10 km (6.2 miles) containing a high concentration of ozone.
Ozone hole A region of marked thinning of the ozone layer in high latitudes, attributed to the chemical action of chlorofluorocarbons.
Sustainable development Sustainable development is a pattern of resource use that aims to meet human needs while preserving the environment so that these needs.
Green revolution A large increase in crop production in developing countries achieved by the use of fertilizers, pesticides, and high-yield crop varieties.
Created by: Smithstephend