不像其他自然资源(比如石油)，水并非不可再利用。
Unlike other natural resources (such as oil), water cannot be used up.
传统的PET塑料是用化石燃料制作的，比如石油，这种持续涨价的有限资源。
Traditional pet plastic is made using fossil fuels, including petroleum, a limited resource that's rising in price.
温室气体排放，比如石油和煤炭等燃料燃烧产生的二氧化碳，被认为是全球气候变暖的原因之一。
Greenhouse gas emissions, such as carbon dioxide caused by burning fuels such as oil and coal, are thought to contribute to global warming.
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