if a sink of poison is unhealthy then the peat consuming that poison will be unhealthy
poison is not destructiveness. peat_dried is not fuel. poison is destructiveness. peat_dried is fuel. peat is not fuel. poisonous_gas is toxic_substance. poisonous_gas is not toxic_substance. poisonous_gas is chemically_harmful_substance. peat is not organic_matter. peat is fuel.