The worst pollution threat is concentrated in and near large cities.
最严重的污染威胁集中在大城市内或其附近。
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，对地下水源构成严重的污染威胁。
Supplies are under increasing threat from overuse and pollution.
供应正受到日益增长的过度使用和污染的威胁。
Chemical pollution will bring about a threat to agriculture and food chain, and consequently to human health.
化学污染将威胁农业和食物链，进而危害人类健康。
It found that the most common threat was habitat loss, while other factors that threatened the plants included invasive species and pollution.
这项研究发现最常见的威胁是生境丢失，而其它威胁着食肉植物的因素包括入侵物种及污染。
While air pollution and chemicals are believed to pose a major threat, our analysis determined that tourism served as the silent killer.
虽然空气污染和化学物质被确认为是主要的威胁，但我们的分析认定，旅游业也是一个无声的杀手。
The report concludes that overfishing is a greater threat to the area than pollution or any other human activity.
报告的结论说，过度捕捞对这一海区的威胁大于污染和其它任何一种人类活动的威胁。
Increasing pollution of the Yangtze River and the threat this poses to the finless porpoise is also a warning for a third of the nation's population that depends on these waters.
持续不断的长江污染以及由此对江豚构成的威胁对于生活在这一水域占据全国人口三分之一的人们来说也是一个警告。
As well as the noise, traffic, loss of arable land and threat to birds, airports are a major source of pollution and greenhouse gas emissions.
机场不仅导致了噪声、交通堵塞、耕地流失，威胁鸟类，还是主要的污染源和温室气体排放源。
This ingenious triple threat of an idea could simultaneously reduce carbon emissions, cut electricity costs and reduce light pollution, without sacrificing the safety that streetlights bring.
这简直是一个一举三得的天才创意，既能同时减少碳排放，又能减少电力消耗，还能减少光污染，而不用牺牲路灯带来的安全感。
Pollution poses a great threat to our existence。
污染对我们的生存造成巨大威胁。
When the chemicals react with nitrogen oxide--found in pollution from cars--they form ozone, a much bigger health threat to humans and animals.
然后，当这些化学物质与氮氧化合物(存在于汽车排放的废气中)发生化学反应时，就会形成臭氧，这会对人类和动物的健康构成更大的威胁。
Pollution in waters near the region's urban centers also hurts fish stocks. Another threat is climate change.
亚洲地区靠近城市中心水域的污染同样也在伤害鱼类资源。
Pollution poses a threat to the continued existence of this species.
污染对这一物种的继续生存造成了威胁。
Air pollution represents the biggest threat to the city.
空气污染是这个城市面临的最大威胁。
As far as these mountain villagers are concerned, pollution is not yet a big threat.
就这些山区村民而言，污染目前尚不是一个大威胁。
Ground level ozone and particle pollution are the greatest threat to human health.
地表臭氧和颗粒污染物是人类健康的最大威胁。
This policy is carried out for controlling pollution since the pollution resulting from plastic bags has become a big threat to urban environment.
这项政策的实施是为了控制环境污染，因为塑料袋造成的污染已经成为都市环境的一大威胁。
Air pollution is an especially serious threat for children because their lungs and immune systems are developing, the report said.
报告指出，因为儿童的肺部和免疫系统还在发育，所以空气污染对儿童的威胁最为严重。
Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth's ecosystems.
平流层臭氧损耗由于空气污染一向被认为是威胁人类健康以及地球的生态系统。
Pollution % poses a great threat to our existence.
污染对我们的生存造成巨大威胁。 。
The progress of the society is based on harmony. Pollution poses a great threat to our existence.
社会的进步是以和谐为基础的。污染对我们的生存造成巨大威胁。
Pollution poses a great threat to our existence.
污染对我们的生计构成一大挟制。 。
With the decreasing labefaction of our environment, the useable fresh water is facing pollution and becoming exhausted in the large-scale, and shortage is a threat to the whole world as well.
但是，当今随着人类生态环境的日益恶化，世界可用淡水资源正在逐渐枯竭并普遍受到人为污染，全世界正面临着可用淡水资源短缺的威胁。
With the decreasing labefaction of our environment, the useable fresh water is facing pollution and becoming exhausted in the large-scale, and shortage is a threat to the whole world as well.
但是，当今随着人类生态环境的日益恶化，世界可用淡水资源正在逐渐枯竭并普遍受到人为污染，全世界正面临着可用淡水资源短缺的威胁。
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