Air pollution comes from smoke,and where does dust come from?这句话什么意思空气污染来自于浓烟，那么尘埃又是从何而来的呢?那么您能告诉我Air pullution comes from smoke and dust from power stations.这句话的意思吗Air pullution comes from smoke and dust from power stations.空气污染来自于浓烟，灰尘来自发电厂。