Global issues
Pollution:
The Air pollution is one of the more problem present.
http://www.universetoday.com/81977/causes-of-air-pollution/
(text about air pollution)
The water pollution is another of the problems present in the global issues.
http://eschooltoday.com/pollution/water-pollution/what-is-water-pollution.html
(text about water pollution)
The cigarette smoke pollution
http://www.medicalnewstoday.com/releases/12481.php
(text about cigarette polution)
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