Slurry electrolysis process, which is researched on the basis of analyzing the main problems in heavy non-ferrous hydrometallurgy, is a clean, energy efficiency extractive metallurgical method.

在对重有色金属湿法冶金存在主要问题进行分析的基础上研究成功的矿浆电解新技术，是一种清洁、高效的提取冶金。

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Timber is merely one of many uses to which forests are put, which also include non-extractive uses such as recreation, watershed management and wildlife.

ECONOMIST: Letters

ExxonMobil, ConocoPhillips, Chevron, Alcoa, DeBeers and 33 other companies are supporters of the Extractive Industries Transparency Initiative (EITI), an international effort by businesses, countries and non-governmental organizations to shed light on what companies pay to governments for a share of their natural resources.

FORBES: Magazine Article

ExxonMobil, ConocoPhillips, Chevron, Alcoa (nyse: AA - news - people ), DeBeers and 33 other companies are supporters of the Extractive Industries Transparency Initiative (EITI), an international effort by businesses, countries and non-governmental organizations to shed light on what companies pay to governments for a share of their natural resources.

FORBES: Seeing Through Big Oil