An ever-increasing population is facing a major problem of availability of safe and acceptable food. Industrial pollution and food processing and packaging is one of the prime causes of poisonous effects of food and foodstuffs. About three –fourths of the human diseases in today’s industrialized world are caused by the environmental pollutants. Foods may be contaminated by substances of synthetic as well as natural origin present in that environment. Contamination of foods may also result from chemical spill or from the process of preparation and packaging of foods as well as certain chemicals added as food additives during food processing. Thus the major hazards from poisonous substances in food comprise: bacterial contamination naturally occurring toxins and chemical carcinogens, accidental chemical contaminants, pesticide contaminants and food additives. Tremendous increases in fertilizers, pesticides, and insecticides etc. for high agriculture yields have badly destroyed food chain