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Варианты ответов и условие задания

1. solar energy
2. harmful
3. to emit
4. acid rain
5. to reduce
6. waste
7. a source of power coming from the Sun
8. causing damage
9. to send out something such as heat, gas
10. rain containing harmful chemicals and damaging the environment
11. to make something less or smaller in quantity, size
12. materials that are no longer needed and are thrown away