直至2007年，杜邦通过提高能源效率，每年能节省22亿美元，这与其当年公布的总利润相当。
By 2007, DuPont was saving $2.2bn a year through energy efficiency, the same as its total declared profits that year.
在过去20年，加利福尼亚州和日本的提高能源效率的项目都表明，通过共同努力是能取得卓越成效的，这也往往让消费者节省很多金钱。
Energy efficiency programs in California and Japan during the past 20 years have shown the remarkable gains that can be achieved with concerted effort, often at large savings to consumers.
也就是到了2020年，欧盟对二氧化碳的减排程度将达到1990年水准的20%；从再生能源中将提取20%的各种能源；并且提高能源效率而节省20%的开支。
By the year 2020, they would cut Europe's carbon emissions by at least a fifth over 1990 levels; derive 20% of all energy from renewable sources; and make energy-efficiency savings of 20%.
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