While factor ies in nearby southern China get much of the blame, environmental scientists say homegrown pollution is a factor , too.

虽然邻近的内地工厂难辞其咎，但环境科学家说，本地的污染也是一个因素。

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Two of China's largest environmental programmes should plan more systemically and enhance collaboration to sustain their success, say scientists.

科学家说，中国最大的环境项目中的两个的规划应该更加系统性，而且要加强合作，从而维持其取得的成功。

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And scientists say it's likely that a combination of pathogens and environmental stressors work together to create a perfect storm.

科学家们声称很有可能是一些病菌的结合体和一些环境因素的共同作用，才给蜂群带来了如此巨大的风暴。

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Some scientists and environmentalists say the environmental impact studies are so narrow that they are meaningless.

CNN: waves

Scientists say Type 1 diabetes is caused by a combination of genetic and environmental factors but they don't know what the trigger is.

WSJ: Wrong Call: The Trouble Diagnosing Diabetes