Air pollution comes from smoke and dust from power stations.smoke and dust from power stations划线 划线部分提问

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Air pollution comes from smoke and dust from power stations.smoke and dust from power stations划线 划线部分提问
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Air pollution comes from smoke and dust from power stations.smoke and dust from power stations划线 划线部分提问
Air pollution comes from smoke and dust from power stations.smoke and dust from power stations划线 划线部分提问

Air pollution comes from smoke and dust from power stations.smoke and dust from power stations划线 划线部分提问
What does air pollution come from?