他领导着一个小组，在研究北京减少污染措施所造成的影响。
He is leading a team that is studying the impact of Beijing's pollution reduction measures.
应该采取措施减少污染。
仅采用甲醇所能实现的最简单的发动机改进措施的车辆，仍将有助于立即减少城市空气污染。
Vehicles incorporating only the simplest of the engine improvements that methanol makes feasible would still contribute to an immediate lessening of urban air pollution.
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