Artificial Sources:

1. Industrial wastages: Industrial by-products are released into the environment; they may or may not affect one’s health. As in all forms of poisoning, the severity of the reaction and symptoms depends on the type and amount of toxic waste that has gotten into body system. For example, arsenic, lead, mercury, benzene, and cyanide as by products. Cyanide is the waste product of metal mining and production, organic chemical processing, and wastewater treatment plants. Cyanide poisoning can quickly lead to brain and heart damage, coma, and death.
2. Agrochemicals: Increase in use of chemicals in agriculture has increased the incidence of poisoning. Organophosphates are the most common agrochemical poisons followed closely by herbicides. There are the intentional poisonings, where compounds, such as phosphorus, arsenic, paraquat, organophosphates, and strychnine, are used as agents for suicidal purposes.
3. Household products: A diverse range of household products commonly used for domestic purposes comprise pesticides, household cleaners, thermometer mercury, antiseptics, kerosene, paint thinners, chocolates etc. Any of these products, if misused or mishandled can cause poisoning.
4. Therapeutic agents: Drugs and chemicals cause poisonous effects when they gain access to the body in large concentration and when countermeasures are delayed. Example: paracetamol in cats.
5. Food and feed: Excessive and regular use of food and feed additives can also lead to poisoning. Grain overload in ruminants is its example.
6. Improper management practices: Poor ventilation in poultry leading ammonia poisoning and Chronic Respiratory Disease is one of its example.