Definition
    
                                    Toxic and hazardous materials (B3) are chemicals that have flammability, that can cause loss due to oxidation (corrotion), can explode and are toxic in nature. As it is harmful to humans and the environment, how to dispose them should not be the same as the other domestic waste. B3 can be solid, liquid or gas.Insecticides, such as harmful insecticide  that can  kill biota useful to life on the 
river and the sea.