recycle - to put used objects or materials through a special process so that they can be used again, litter - waste paper, cans etc that people have thrown away and left on the ground in a public place, conservation - the protection of natural things such as animals, plants, forests etc, endangered - animal, bird etc is one that may soon no longer exist because there are so few of them, fossil fuel - coal or oil that is produced by the very gradual decaying of animals or plants over millions of years, depletion - when an amount of something is greatly reduced or nearly all used up, e.g. ozone layer ..., deforestation - the cutting or burning down of all the trees in an area, overpopulation - too many people living, famine - a situation in which a large number of people have little or no food for a long time and many people die, shrinking - habitat that is becoming smaller because of human activity, melting - becoming liquid, acid - a chemical substance that has a pH of less than 7,

Unit 11_Environment

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