population growth人口增长

global warming全球变暖

depletion of the ozone layer臭氧层变薄

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air pollution空气污染

water pollution水污染

noise pollution噪音污染

endangered species濒临灭绝的物种

renewable resources可再生资源

protect forest resources保护森林资源

environmental racism环境歧视

energy production能源制造

ecological balance生态平衡

exert a disastrous effect on产生灾难性的影响