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1. If a person looks at the sky at night, he won’t be able to see the Milky Way by naked eye.
2. If noise pollution happens regularly, it will cause stress or nuisance.
3.  If  water  pollution  gets  more  serious  in  the  future,  it  will affect  the  development  of economy and society.

4. If Australia has invested in water in Viet Nam with good results, half of the population in the rural areas will have access to fresh water.
5. If you use compact light bulbs, you will save a lot of energy.
6. If we have more space, we will plant more trees.

1. If a person looks at the sky at night, he will not be able to see the Milky Way by naked eye.
2. If noise pollution happens regularly, it will cause stress or nuisance.
3.  If   it  affects  the  development  of economy and society, water  pollution will ge  more  serious  in  the  future

4. If Australia have invested in water in Viet Nam with good results, half of the population in the rural areas will have access to fresh water.
5. If you use compact light bulbs, you will save a lot of energy.
6. If we have more space, we will plant more trees.

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