MANY PLANTS EVOLVE POISONS AS PROTECTIVE MECHANISMS AGAINST ANIMALS FEEDING ON THEM. FOR EXAMPLE, SOLANINE IN POTATO, GOSSYPOL IN COTTON SEEDS, OXALIC ACID LEAFY VEGETABLES GOITROGEN IN CABBAGE, PHALLIODINE IN MUSHROOMS, BOAA IN KHESARI, CYNOGENS IN TOPIOCA AND BITTER ALMONDS AND SO ON . AROUND 500 SPECIES OF MARINE FISH ARE POISONOUS AND MANY OF THOSE ARE AMONG EDIBLE VARIETIES . PRE-HISTORIC HUMANS DEPENDENTS EXCLUSIVELY OF ANIMALS FOR SAFE FOOD, AS FOODS CONSUMED BY ANIMALS WITHOUT OBVIOUS HARM WERE SAFE FOR HUMANS TOO. DEVELOPMENT OF MODERN FOOD TECHNOLOGY AND FOOD PROCESSING INDUSTRIES HAS OPENED UP THE RISK OF CONTAMINATION OF FOOD BY A HOST OF CHEMICALS KNOWN AS ADDITIVES,PRESERVATIVES COLOURING AGENT, ETC. USE OF PESTICIDES IN INDIA BEGAN 1948 WITH SMALL SCALE OF IMPORTS OT DDT BHC. PESTICIDE USE IN AGRIL BEGAN IN 1949. INDIA USE AROUND 30000 TONS OF PESTICIDES ANNUALY, MORE THAN 70%OF ...