Environment and Pollution

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• The word endangered means a species seriously at risk of extinction.
• A gradual increase in the overall temperature of the earth's atmosphere is called global warming .
• To contaminate means to make something impure by exposure or addition of a poisonous or polluting substance.
• The weather conditions prevailing in an area in general or over a long period is called climate .
• Exhaust is waste gases expelled from an engine, or other machine in the course of its operation.
• Chemicals that are sprayed on top of crops to prevent insects from destroying them are called pesticides .
• Waste is unwanted or unusable material, substances or by-products.
• The atmosphere is the gases surrounding the earth.
• A substance that us harmful or poisonous for the environment is pollution .
• Something crammed full is overcrowded .
• We dispose of waste material by burying it in a landfill .
• A prolonged period of abnormally low rainfall leads to a drought .
• The invisible gaseous substance air is a mixture of mainly oxygen and nitrogen.
• Fog or haze intensified by smoke is called smog .
• Rain that contains harmful chemicals is called acid rain .

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