... our natural environment 对我们的自然环境构成了严重的威胁 environmental pollution and global warming 环境污染和全球变暖 non-renewable energy sources 不可再生能源 ..
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The environmental problems of our earth are so severe, such as global warming, the damaged ozone, and all the different kinds of pollution.
现在地球环境问题可真是严重，什么全球气候变暖啊，臭氧层耗损啊，还有各种污染。
It's easy to feel vulnerable and frustrated when one hears news stories and articles highlighting the hazards of global warming, environmental pollution and other ill-effects of environment abuse.
当一个人听到强调全球变暖，环境污染和其他环境破坏的不良影响的新闻报道和文章时，很容易变得脆弱和失望。
Human beings face challenges from nature: global warming, ozone holes, and environmental pollution.
人类面临自然的挑战：全球变暖，臭氧洞和环境污染。
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