We need to press on with battery research for plug-in and hybrid vehicles, and expand the use of clean diesel vehicles and biodiesel fuel.

我们需要继续进行电动车和混合动力车的电池的研究，并扩展洁净的柴油车和生物柴油的使用。

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A strict emission zone bars older diesel vehicles, and rates of car use, which are already among the lowest in Germany, have dropped even further in recent years.

该市有一个限制老式柴油车和汽车使用率的限制排放区，这里已经是德国汽车使用率最低的地区之一，近年来使用率还在进一步降低。

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On the other hand, wider-spread use of small-displacement vehicles and the rise in the proportion of diesel cars will save energy by an additional 5%.

另外，普及小排量汽车和适当提高柴油车的比例，可分别实现5%的节能目标。

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Analysts cited an expectation that automotive sales will pick up in the key markets of China and the U.S. Both markets tend to rely upon gasoline-powered vehicles than can use palladium in auto catalysts, whereas the European market relies more upon diesel-powered vehicles that need more-expensive platinum.

FORBES: Demand For Auto Catalysts Seen Picking Up

The AA said rising prices and greater use of smaller and diesel vehicles had contributed to the fall in consumption.

BBC: Petrol pump sales decrease over five years, says AA