Pollution - What is it?

According to the dictionary, the definition of pollution is the presence of matter (gas, liquid, solid) or energy (heat, noise, radiation) whose nature, location, or quantity directly or indirectly alters characteristics or processes of any part of the environment, and causes (or has the potential to cause) damage to the condition, health, safety, or welfare of animals, humans, plants, or property.
A big definition to a big problem.

Major forms of pollution

• Air pollution [Korea Air Pollution];
• Water pollution [One of the most serious case of water pollution occurred in Minamata, Japan];
• Radioactive contamination [The most serious case was the Chernobyl disaster];
• Noise pollution;
  

Sources:
http://www.savephoenix.org/images/air-pollution.jpg
http://photo.ortho.free.fr/images/divers/pollution.JPG
http://eighterscreativity.com/projects/D2D/group2/img/Water-pollution.jpg
http://www.who.int/water_sanitation_health/industrypollution/en/index1.html