Food web

4. Living things, such as bacteria and fungi, which can sometimes break down toxins in the environment.
5. The process by which toxins become more concentrated in organisms as they move up the food chain.
7. A persistent pesticide that was banned in many countries but still exists in the environment due to its long half-life.
8. The process by which organic substances are broken down, sometimes releasing toxins into the environment.
9. A term describing the time it takes for a substance's concentration to decrease by half in the environment.
11. A toxic metal that accumulates in fish tissue and affects the nervous system of organisms that consume it.

1. The process by which plants produce food, mentioned as part of environmental interaction with toxins.
2. Description of substances like DDT and mercury that remain in the environment for long periods.
3. Chemicals used in agriculture to control pests, some of which are harmful to the ecosystem.
6. A more toxic form of mercury that forms in water and accumulates in fish.
10. Type of tissue where toxins often accumulate in organisms.