你会发现，当人们了解到过度使用塑料袋的弊端及其对环境造成的危害时，他们会自觉地加入到30天塑料袋“节食”计划中来。
You may find that when people understand the dangers of excessively using plastic, and what it is doing to our environment, they may go on the 30 day plastic bag diet themselves!
塑料袋的确危害很大，它们挂在枝头(由此而得“巫婆的灯笼裤”之名)，需要数百年才能分解，它们助长石油需求，正是石油用于制造塑料。
And quite right, too. They get caught in trees (hence the epithet "Witches' Knickers"), take hundreds of years to decompose and push up demand for oil, used to make plastics.
塑料袋和聚苯乙烯是洛杉矶一个大的环境危害。
Plastic bags and Styrofoam are a big environmental hazard in Los Angeles.
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