pollution threat

基本解釋

The worst pollution threat is concentrated in and near large cities.
最嚴重的污染威脅集中在大城市內(nèi)或其附近。
However, substantial amounts of urban garbage are dumped and buried at the surface, which constitutes a serious pollution threat to the groundwater source.
但其地表堆埋了大量的城市垃圾，對地下水源構成嚴重的污染威脅。
Pollution poses a threat to the continued existence of this species.
污染對這一物種的繼續(xù)生存造成了威脅。

Yet, while our livelihoods are inseparable from the health of these natural systems, our oceans are under threat from pollution, coastal development, overfishing, and climate change.
WHITEHOUSE: Presidential Proclamation -- National Oceans Month, 2012
This does not surprise environmentalists, who have long argued that any policy of pollution-reduction that does not include a threat of punishment for non-compliance is useless.
ECONOMIST: The Lone Smog State