Definition Persistent Organic Pollutants are organic compounds that are resistant to biological, photolytic and chemical degradation. It has ability to be persistent in environment without broken down into less hazardous compunds. Characteristics Lipophilic and Hydrophobic Transport to long distance Semi-Volatility Persistence in environment Bio-accumulation in Food chain Bio-concentration into Fats and oil tissues Toxic, carcinogen and mutagens Have large lifespan Sticks to soil very strongly that only breakdown by volatilization. Acute, toxic to humans Highly Concentration in marine mammals Causes It comes from industrial areas, combustion products and burning of other waste materials. Many kind of POPs like PCDDs are produced from coal burning plants and municipal waste incineration. Effects It affects reproductive system, immune system, nervous system and endocrine system. Also cause beha...