It is also different from any other smoking-related study because it strictly tracks the effects of smoking without "interference" from other harmful causes such as poor diet and pollution.

这项研究与其它关于吸烟的研究不同之处还在于其严密追踪吸烟所造成的影响，而将其它诸如不良饮食习惯和污染等有害因素所造成的“干扰”排除在外。

youdao

The causes of groundwater nitrate pollution have been analyzed and the appropriate measures for preventing groundwater from nitrate pollution have also been proposed.

分析了造成地下水硝酸盐污染的原因，提出了相应的防治措施与对策。

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Hogwash fat containing large quantity of animal and vegetable oil adds difficulty to be treated with, hogwash fat also causes serious environmental pollution and resource waste by sluiced directly.

餐饮泔水油中含大量的动植物油脂增加了污水处理的难度，泔水油的直接排放也造成了严重的环境污染及资源浪费。

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But this plan has also come under criticism. The proposed power plants will burn heavy oil, which must be imported and causes pollution.

VOA: standard.2009.08.28

It took the Bush Administration 16 months to acknowledge what scientists have known for more than a decade: the same pollution--primarily from fossil fuels--that causes asthma and respiratory illness is also altering and warming the atmosphere.

CNN: Bush Takes a Backseat