Hamnett does not believe environmental concern is a passing fad.

哈姆内特不相信对环境的关注是一时的狂热。

《柯林斯英汉双解大词典》

The rampant loss of species occurring today is a major environmental concern.

目前，越来越多的物种濒临灭绝，这是一个重大的环境问题。

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POPs are a major environmental concern due to neurological damage, immune system disorders, cancer and a host of other health problems they cause.

持久性有机污染物造成神经损害、免疫系统紊乱、癌症以及许多其他健康问题，因此是一种严重的环境问题。

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But pollution is not the only environmental concern with transportation.

VOA: special.2010.01.11

Offshore deposits present a potentially enormous source of methane but also some environmental concern, because the underwater geology containing them is unstable in many places.

BBC: Production test

The mission is part of Esa's Earth Explorer programme - seven spacecraft that will do innovative science in obtaining data on issues of pressing environmental concern.

BBC: Esa's Cryosat ice mission given launch date

Although widespread pollution of groundwater by fracking seems unlikely (shales that hold gas typically lie far deeper than groundwater supplies), such risks have raised a great deal of environmental concern about the technology.

ECONOMIST: Shale gas should make the world a cleaner, safer place