In March 2005, Brazilian miner Vale secured an exploration contract and began work on feasibility studies for an iron ore mine — a complex undertaking due to environmental concerns.
2005年3月，巴西矿业公司淡水河谷获得了一份开采合同，并开始为这家铁矿石公司提供可行性报告研究，因为环境原因这项工作很复杂。
The report warned of the great uncertainty about the feasibility, costs, effectiveness and environmental and social consequences of almost all geoengineering ideas.
该报告警告性地指出了几乎所有地球工程学设想所存在的风险，其可行性、成本、有效性、对环境和社会的影响等方面都存在巨大的不确定性。
In the second chapter, through our analysis on theoretical basics of performing environmental accounting, we proved theoretical feasibility of performing environmental accounting.
第二章对我国实施企业环境会计的理论基础进行了分析，指出了我国实施环境会计的理论可行性。
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