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Choose the correct preposition

People are responsible for/ with most of the damage to cultural sites. The rainforests are on/ at risk of complete deforestation. A temple appears in/ on the flag of Cambodia The sun’s rays may become harmful to/of our skin and eyes. Kazakhstan is famous about/ for its steppe. We need to do more to protect monuments at/ in danger When not on/ in use; Turn off your computer One solution through/ to the problem of air pollution is the use of public transport. We need to reduce the amount on/ of fumes in the air.