High gas costs and very low auction prices for carbon emissions within the European emissions Trading Scheme meant that generators chose to use dirty coal rather than gas.
较高的天然气价格和如今欧洲排放交易体系上极低的碳排放量拍卖价格意味着高污染的煤炭更加受到发电厂商的欢迎。
Transforming tar sands into crude is costly as well as dirty: the process only becomes profitable with oil prices in the $60-85 range or higher.
把焦油沙转换成原油不仅费用昂贵而且对环境造成污染。 当油价在60-85美元范围波动或允许再高一点,这种提炼过程才有利可图。
Our days are packed with work, chores, obligations, dirty dishes, laundry, phone calls, text messages, the Internet, e-mails, high gas prices, low stock prices and more to do than we want to.
我们的日常生活充斥着工作，家务，义务，需要清洗的碗筷，脏了的衣服，还有来电，短信，因特网，电子邮件，高昂的燃气费用，走低的股市以及很多我们不得不做的事情。
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