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Immediate measures should be taken to prevent rapid population growth, which causes many problems. |
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Rapid population growth is causing so many problems that sensible measures must be taken immediately. |
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Rapid population growth causing many problems cannot be prevented unless strict measures are taken, |
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The application of immediate measures is essential to prevent rapid population growth. which is the cause of many problems. |
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Rapid population growth will continue to create new problems if immediate measures are not taken. |