悲观者认为更多的人意味着更少的食物，上升的资源需求意味着枯竭和战争，而近几十年来，扩张的产能意味着更多的污染和全球变暖。
Pessimists see a world where more people means less food, where rising demand for resources means depletion and war, and, in recent decades, where boosting production capacity means more pollution and global warming.