Causes of pollution
Devi : What is one cause of air pollution?
Nick : Automobiles are a major cause
of air pollution.
Geoff : Do factories also cause pollution?
Nick: Yes, they do. Factories, such as this
one , cause lots of pollution.
Geoff : Really ?
Nick : Yes. They pollute the air and release
wastewater into the sea.
·ÕèÁÒ Video CD Dynamic English 2