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Engines of new passenger cars are tuned at the sea level. However, in several countries, a significant part of the engine operation is performed at higher altitudes than that of the sea level. The different air density can have a significant impact on fuel consumption. In the case of gasoline engines, the higher altitude theoretically leads to lower fuel consumption due to lower throttle frictions...
An efficient way to decrease the CO 2 emissions is the replacement of gasoline passenger cars (PC) by diesel ones, which emit less CO 2 . This can be more effective in Greece where the percentage of new diesel PC remains less than 1%, contrary to the other countries of the European Union, which have high diesel penetrations. The benefit of CO 2 emitted from new PC is studied...
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