Air pollution has always been an unwanted byproduct of human activities, and has probably had harmful effects on human health since the prehistoric people discovered fire.
The problem increased with the growth of cities, the practice of arts and trades, and the extensive development of industrial growth that began in mid-1800.
Air pollution has always been an unwanted byproduct of human activities, and has probably had harmful effects on human health since the prehistoric people discovered fire.
The problem increased with the growth of cities, the practice of arts and trades, and the extensive development of industrial growth that began in mid-1800.