Use the correct form of the words in brackets to finish the sentences.

Air-conditioning systems have chlorofluorocarbon that is one

of the well-known environmental

.

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Fossil fuels which are non-renewable pollute the air and cause air ______.

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Recycling provides a method of reducing the amount of waste materials that gets to the landfills – thus ______ it less probable for environmental pollution to take place.

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If wastes are thrown ______, they can cause pollution in water, land and air.

Find out the synonym of the underlined word from the options below.

The area is roped off because the water is seriously polluted.         

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The effects of _____ are the environmental and social changes caused (directly or indirectly) by human emissions of greenhouse gases.

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We need to cut down on our fuel                by having fewer cars on the road.        

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Forest biodiversity is threatened by illegal                  carried out globally.