Earlier in the year, a report from the National Research Council identified the combustible water, also known as methane hydrate, as a potential source of natural gas.
In 2005, that meant approximately 2 million tons of water bottles ended up in U.S. landfills, according to the National Resources Defense Council (NRDC) (see References 3, Question 7).
这意味着在2005年，据美国自然资源保护委员会统计，有近2百万吨废水瓶躺在美国的垃圾场里。
3
A dour National Research Council report recently poured cold water over the notion that plug-in vehicles will make much difference on oil use or the environment before 2030 at the earliest.
而最近National Research Council的报告则给先前关于充电式汽车将会在2030年前大幅度减少石油使用量并且改善环境的想法泼了冷水。