Air pollution is caused by impurities or toxins that have access to the fresh air. Make air, toxic, and it can affect the health of people is dangerous on respiratory tract.
Air pollution caused by impurities or toxic contaminants into the air. The air is toxic and it can affect people's health, damaging to the respiratory tract.
Air pollution is caused by the impurities or toxins to mix with air. Air pollution and it can affect the health of people make dangerous about respiratory.