What is the one huge problem that we haven’t really solved? Boeing and Whirlpool, meanwhile, are working to meet emissions redu

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问题 What is the one huge problem that we haven’t really solved?
Boeing and Whirlpool, meanwhile, are working to meet emissions reduction targets even though ______.

选项

答案no federal law yet requires this

解析 细节题。根据题干定位到第七个小标题第二段末句Boeing and Whirlpool, meanwhile,are working to meet emissions reduction targets even though no federal law yet requires this,即: Boeing和Whirlpool正在努力达到减少排放的目标,即使联邦法律并没有要求这样做,故得答案。
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