To this very day car and truck fuel economy performance has been some of the worst in the world. Also, only seven percent of our nations energy comes from renewable energy sources, this is much less compared to most other technology advanced nations. According to president Obama, since the year 2007 American CO2 emission levels has fallen almost 13 percent. This decrease is one of the biggest declines among most industrialized countries and much steeper than in Europe. This is because in the past few years European nations have focused more on climate control rather than CO2 emission levels. This is also the biggest decline in CO2 emissions for the United States ever!
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