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Poison
A substance with an inherent property that tends to destroy life or impair health


Toxin
A poison produced by a micro-organism or other organism and acting as an antigen in the body


Toxicant (Toxic)
A chemical compound that poisons organisms


Pathogen
A micro-organism that can cause disease


Mutagen
A substance which causes genetic mutation


Teratogen
A drug or other substance capable of interfering with the development of a fetus, causing birth defects


Fetotoxin
A substance or agent that can poison or cause degenerative effects in a developing fetus or embryo


Endocrine disruptor
A chemical that interferes with the endocrine system, for instance by binding to estrogen or androgen receptors, leading to adverse effects


Carcinogen
A substance that causes cancer


Pollution
Harmful substances or products in the environment


Genetic pollution
The spread of altered genes from genetically engineered organisms to other, non-engineered organisms


Toxic Trespass
When toxic materials used on one property drift (trespass) onto another property. Most attention is given to airborne drift, but underground plumes and other modes of migration can also be involved. For example

• On a large scale, Toxic Trespass occurs from industrial emissions

• On a neighborhood scale, Toxic Trespass occurs from pesticide application to lawns, gardens, and buildings