Man has woefully misused the earth’s natural resources downthrough the ages. This has been done largely through his ignoring 1.__________P
of the consequenses, but in the process he has succeeded in layingwasteful vast expanses of forests and croplands. If our2.__________
extending population is not to suffer from shortages and pollution 3.__________in the future, a great effort must be made to repair some of
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.__________