但是核能成本过高，而且还有核物质废料如何处理或回收的问题。
But nuclear power has staggering capital costs, and brings the controversial question of how to dispose of or recycle nuclear waste.
2005年，美国城市垃圾中塑料品废料的回收率小于6%，而在这小小一部分回收的塑料品中有相当数量得到回收的两种塑料是PET与HDPE。
In 2005 less than 6% of the plastic from America's municipal waste stream was recovered. And of that small fraction, the only two types recycled in significant quantities were PET and HDPE.
有人说目前美国对中国出口最多的是等待回收再循环的垃圾和废料。
By some counts, America's largest export to China is now trash and scrap for recycling.
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