燃料电车交通工具不会施放引起全球变暖的温室气体，但他们昂贵的价格和氢气站的不足成为进入普通消费者的障碍。
Fuel cell vehicles belch out none of the greenhouse gases blamed for global warming, but their high cost and a lack of hydrogen refueling stations pose obstacles to mainstream use.
在加油站和超级市场，价格都在上涨。
该价格——通过把全国范围内数千家加油站的价格平均后计算得到——比去年的均价低了1.42美元。
The price -- calculated by averaging prices at thousands of gas stations nationwide -- is $1.42 lower than the average one year ago.
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