As Per Third World country Bangladeshi air so polluted. They have Many Reason. Motor Vehicle Dust, Factory Smoke also brick-field. By this brick-fields air pollution increase rapidly. But highly polluting brick-fields are still operating unabated across the country including on the outskirts of Dhaka posing serious health risks in this dry season, harming the nature and damaging arable land. Most of these conventional chimneys are baking bricks round the clock burning wood, tires and low-quality coal. Replacing the chimneys with improved modern ones can relieve the situation to a considerable extent. But this issue has never been taken seriously by any government in the past two decades of rapid urbanization.