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. |A18j solve the problem. Natural resourced [A19| not endless so using other forms of energy such as wind, sun, water and even sea waves_ |A2ll to drive cars in cities and towns that_|A22) on electricity — a much cleaner fuel than petrol. And we_ resources by recycling things made of glass, aluminium, plastic and paper. In recent years the number of environmental problems_ the atmosphere which_|A15| to the greenhouse effect; this_
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