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This year, the International Day for the Preservation of the Ozone Layer highlights the central role of good governance in pursuit of environmental goals.

今年的保护臭氧层国际日突出善治在实现环境目标方面的核心作用。

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Apart from global warming, Mr Ban will meet people affected by another environmental problem-the emergence of a hole in the ozone layer.

除了了解全球变暖问题，潘基文还将会见受到臭氧层空洞影响的人们。

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By the time the makers of cigarettes were fighting against legislation on secondary smoking and the makers of chlorofluorocarbons against regulations to protect the ozone layer, their efforts had coalesced into a general attack on the environmental movement and the regulatory bodies it had brought into being.

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Nitrous oxide is also considered a greenhouse gas and is 310 times more dangerous to the Earth's ozone layer than carbon dioxide, said Joseph Johns, chief of the U.S. attorney's environmental crimes section.

NPR: Feds Raid 17 Calif. Businesses For Nitrous Oxide