利用再生纸。
富裕国家应尽量使用再生纸，以减少对木材的需求。
Rich countries should use more recycled paper to reduce the demand for wood.
富裕国家应尽量使用再生纸，以减少对木材的需求。
The richer countries should try to use used paper to reduce the demand for wood.
再生纸对水的污染比原来少了35%，对空气的污染比原来少了74%。
Recycled paper can be made with 35% less water pollution and 74% less air pollution.
再生纸对水的污染比原来少了35%，对空气的污染比原来少了74%。
Recycled paper can be made with 35% less water pollution and 74% less air pollution.
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