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信息发布者：
Four minutes.
He believes that in the future, millions of people 
will live and work in space.
By moving polluting businesses away from the 
Earth and into space./They can move polluting 
businesses away from the Earth and into space.
Because rockets create huge amounts of pollution 
(as they burn tons of fuel in order to fly into the sky).
Yes. Because travelling in space can encourage more 
people to explore the mystery of space, and thus 
contribute to providing more possibilities for future 
scientific development. (答案不唯一, 言之有理即可)
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