汽车堵塞了十字路口和高速公路，排出的废气遮蔽了天空，空气中喇叭声不断。

Cars clog intersection and expressways. Their exhaust clouds the sky and the air is full of the sound of horns.

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但比这更糟得多的是在洛杉机市内或周围噩梦般的旅行，那儿根本没有公共交通工具，毫不夸张地说，人们正被自己汽车排出的废气呛死。

But far worse is the nightmare of travel in and around Los Angeles, where public transport does not exist and people are literally choking to death in their exhaust fumes.

youdao

所以，到底应该怪罪于汽车和工厂排出的废气，还是沙漠来的沙尘，答案再混浊不过了。

So, whether the blame lies with exhaust fumes or desert dust is as clear as mud.

youdao