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extending population is not to suffer from shortages and pollution 3.__________in the future, a great effort must be made to repair some of

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in the future, a great effort must be made to repair some ofthe damages already done and to stop more harm from done. A 4.__________

few people throughout the world are becoming less aware of our 5.__________past mistakes and are striving to halt this destruction and to revert

to the use of methods from which will give us full use of our 6.__________resources without destroying them. The job may be a long one,

resources without destroying them. The job may be a long one,require much study and practice. The most important thing that7.__________