Most air pollution is caused by reasons that humans require to travel to different locations in order to perform daily activities, and therefore have to use. Founded as air pollution the most.
Most air pollution caused by humans is required to travel to various locations in order to do daily activities, so it is used more and more. This is the most air pollution.
Most of the air pollution caused by the human need to travel to different places to do the daily activities and therefore are used car. Which is the source of causing air pollution as much as possible.