Green barrier can bring environment credit and make agricultural products of advanced countries have differential advantage.

绿色壁垒还能够带来环境信誉，环境信誉使发达国家的农产品形成差异化优势。

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Conclusion The National Standards for Environment and Facility should be followed when laboratory animal barrier system facilities were built or refitted.

结论在实验动物屏障系统的新建或改建时，必须按照实验动物设施环境的国家标准。

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The environment worsens day by day, the green trade barrier is its realistic basis.

而环境日益恶化、绿色贸易壁垒是其现实依据。

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"There is no evidence whatsoever to suggest protection of the environment is a barrier to economic growth, but plenty to suggest smart regulation is actually a stimulus to growth, " he said.

BBC: Science & Environment

In April, Plevin agreed to erect an acoustic barrier after consultation with Tameside Council and the Environment Agency, following complaints of excessive noise at the plant.

BBC: Wood dust protesters march from Mossley to Plevin plant

In 2005 Peter Borrows from the Environment Agency told BBC News a second barrier may be needed.

BBC: Thames Barrier engineer says second defence needed