what are the poisonous substances

The term "poisonous substances" refers to a wide array of chemicals, compounds, or natural toxins that can cause harm or even death to organisms when ingested, inhaled, or absorbed through the skin. Here is a brief list of examples:

1. Heavy Metals: Lead, mercury, arsenic, and cadmium can be poisonous to humans and animals.

2. Pesticides: Many pesticides used in agriculture can be harmful if not used properly.

3. Household Chemicals: Some cleaning products, when improperly mixed, can release toxic fumes.

4. Industrial Chemicals: Substances like chlorine gas, ammonia, and various solvents can be hazardous.

5. Plant Toxins: Plants such as poison ivy, poison oak, poison sumac, and certain species of mushrooms (like the death cap) contain toxins.

6. Animal Venoms: Many creatures, such as snakes, spiders, and some marine animals, produce venom that can be deadly.

7. Fungal Toxins: Some molds can produce mycotoxins, which are harmful to humans.

8. Bacterial Toxins: Certain bacteria can produce toxins that cause food poisoning, such as botulinum toxin from Clostridium botulinum.

9. Toxins in Food: Certain foods can contain naturally occurring toxins, like the solanine in green potatoes or the caffeine in excessive amounts.

10. Toxic Gases: Carbon monoxide, sulfur dioxide, and nitrogen oxides are all toxic gases that can be harmful if inhaled.

11. Certain Drugs: In high doses or improper use, many drugs can become toxic.

12. Radioactive Substances: Exposure to radioactive materials can lead to poisoning through radiation sickness.

Please note that this is not an exhaustive list, and handling or exposure to any of these substances should be done with extreme caution. It's very important to follow safety guidelines and regulations when dealing with potentially poisonous substances.