沙尘暴是一种自然现象，但是受到了人类活动的影响，现在和交通和工业空气污染一样严重。
Dust storms are a natural phenomenon, but are influenced by human activities and are now just as serious as traffic and industrial air pollution.
然而，随着越来越多的废气排放是汽车、空气污染问题变得更加严重。所以现在我们提倡过低碳的生活。
However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious.
然而，随着越来越多的废气排放是汽车、空气污染问题变得更加严重。所以现在我们提倡过低碳的生活。
However, with more and more waste gas being discharged by the cars, the problem of air pollution becomes even more serious.
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