Although conventional chemical degumming processes can remove most gum from bast fibers, they are usually time - and energy-consuming, high-cost and causing pollution to the environment.

目前常用化学脱胶工艺虽然可除去麻纤维中的绝大部分胶质，但脱胶时间长、耗能多、成本高，且污染环境。

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In January 1994 an oil barge ran aground off the coast of San Juan, Puerto Rico, leaking its cargo of 750000 gallons into the ocean while causing the pollution of the city's beaches.

1994年1月，一艘油驳船在波多黎各圣胡安海岸触礁，将75万加仑的货物泄漏到海洋中，并污染了该市的海滩。

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Air pollution is now causing a growing clamour and land turns out to have a myriad valuable USES.

空气污染引起越来越多的关注，对于土地使用也越来越多样化。

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Or, worse than that, if the losses are accelerating because of us - by tearing up habitats or causing pollution or simply slaughtering every member of a species?

BBC: Why such a fuss about extinction?

The EPA last year issued the first-ever standards to control smog- and soot-forming gases from gas wells site, and updated existing rules to reduce cancer-causing pollution, such as benzene, from other equipment.

NPR: Report: Flaws In EPA Drilling Pollution Data

Some Shell pipelines that crisscross the delta are decades old and can fail, causing massive pollution.

NPR: Dutch Court Rejects Most Of Shell Spill Case