变化是类似的,即：
1.There will be more people.
= There are going to be more people.
2.There will be less free time.
= There is going to be less free time.
3.There will be fewer cars.
= There are going to be fewer cars.
4.There will be less pollution.
= There is going to be less pollution.
5.There will be fewer trees.
= There are going to be fewer trees.
there be句型中的一般将来时两种形式而已,其中be going to的be采用就近原则（there be句型的要求）.
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