By 2050,there will be 9.1 billion people.

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• By 2050,there will be 9.1 billion people.
• By 2025,scientists predict the world will have 7.8 billion people.
• in the 20 years that follow that,till the planet stabilizes at around 9 billion people.
• By 2025,scientists predict the world will have 7.8billion people.变成一般疑问句!
• China has over one billion people.=China has (_) (_) one billion people.
• China has over one billion people.=China has (_) (_) one billion people.
• Today there are 6 billion people on the earth.By the year 2050 there may be 12.5 billion.This means we need more food.One way to produce more food is by growing stronger plants.For thousands of years,farmers have madeplants better.Every season,they pick the best plants for the next season.It works very slowly.Since 1983,scientists have been able to change plants more quickly by changing their genetic material (遗传物质).Foodsfrom plants grown in this way
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