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。

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This chemical pollution has two sources: the factories which dump polluted water directly into the river and the local community which dumps untreated human wastes into the river.

这种化学污染有两个来源：直接把污水倒进河里的工厂，和把未经处理的人类垃圾倒进河里的本地社区。

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Because of the above reasons stratospheric more easily than the troposphere by chemical pollution.

由于上述原因平流层比对流层更容易被化学污染影响。

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(OMITTED) Remais,an assistant professor at Emory University's Rollins School of Public Health in Atlanta, He says the growing economy is fueling environmental risks such as air pollution and chemical toxins, while age-old environmental challenges remain.

VOA: standard.2010.04.07

He said that the main threats in Atlantic rainforest coastal areas include chemical pollution, urbanization, fishing and the newly-found offshore oil and gas wells.

UNESCO: Communication and Information

The environment ministry reveals that more than 3, 000 places in China have "grim" chemical pollution with "cancer villages" arising in many places, Legal Daily reports.

BBC: China media: Hacking dismissed

Yet 82 percent of teens and 76 percent of boomers think government leaders should do more to control pollution from the oil and chemical industries, even if that increases the price of gas and oil.

CNN: Kids on mountain