how do modern industrial chimneys help to reduce air pollution?

Modern industrial chimneys help to reduce air pollution as they are too long and extend high in air. All the smoke and harmful gases produced by industries are expelled through them. As, these chimneys are long they expel this harmful gases away from the people. Also the modern chimneys are fitted with filters which trap the dust and particulate mater present in the polluted air. Thus, decreasing the amount of pollutants in it and making it comparatively clean.

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