Translate the following sentence into English.为了减少污染，他从不在等候的时间里让

Translate the following sentence into English.

为了减少污染，他从不在等候的时间里让自己的汽车引擎开着。

IN ORDER TO REDUCE THE POLLUTION, HE NEVER RUNS THE ENGINE WHEN HE IS WAITING.

考点：为了in order to；减少污染reduce the pollution；开着引擎run the engine。