For example,-|||-cars have made the air 2.h __ to people and poisonous(有毒的)gas is 3.g __ off by-|||-factories. Trees on the hills have been 4.c __ down and waste water is being poured continuously-|||-into rivers. Furthermore,wherever we go today,we can find rubbish 5.c __ disposed(处理)-|||-Pollution is threatening (威胁)our existence. The Earth is our home and we have the duty to take-|||-6.c __ of it for ourselves and our later generations. Fortun more and more people have-|||-7.r __ these problems. Measures have been taken to deal with these problems 8.b __ the-|||-government, Laws have been passed to stop 9.p __ I hope the problem will be solved in the near-|||-future and that our homeland will 10.b __ better and better.

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Exposure to sunlight can have a negative impact on peoples emotions.-|||-2.-|||-

[名词解释] Off-air call setup

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