Some oil firms do this already to carbon dioxide that forms part of raw natural gas.

许多石油公司已经这样做了，将二氧化碳变成天然气的一部分。

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Other raw materials traded lower on Monday, with natural gas, gold, copper, and soybeans declining.

周一，随着天然气、黄金、铜、和大豆的暴跌，其他原材料交易出现下挫。

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Now China has another attraction for the energy-intense chemical industry: vast supplies of coal that can replace oil and natural gas as raw materials for chemical production.

现在中国对高耗能的化学工业来说又平添了一项吸引力：中国巨大的煤炭资源可以用来代替石油和天然气用作化工生产的原材料。

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The firm also owns 21 gas processing plants that separate propane and ethane from raw natural gas.

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Natural gas processing means the separation of non-methane gases from raw natural gas, or the separation of the non-methane gases and liquids into one or more components.

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But with a global capacity glut in 2001 chemical prices softened, even as raw material costs like natural gas began a fivefold price increase.

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