Bill Gates argues that if you improve health, people (will have/are having) fewer children. But what he doesn't say is that the result (will be/is about to be) more and more old people.
Bill Gates argues that if you improve health, people will have fewer children. But what he doesn't say is that the result will be more and more old people.
If we (will rely/are going to rely) on new technology to solve this problem, then we're in trouble. New technology creates as many problems as it solves.
If we are going to rely on new technology to solve this problem, then we're in trouble. New technology creates as many problems as it solves.
I (will tell/am going to tell) you something - I (will be/am going to be) very surprised if the population growth rate (won't start to/doesn't start to) fall in the next 20 years.
I will tell you something - I will be very surprised if the population growth rate doesn't start to fall in the next 20 years.
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