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[[Image:Ragwort.JPG|thumb|right|200px|<p>'''Ragwort''']]
==Introduction==
==Introduction==
Toxicology is the study of chemicals or substances that can damage tissues or destroy life. Such chemicals and substances are commonly referred to as poisons, and can include plants, pharmacological agents, heavy metals, herbicides, insecticides, rodenticides, mycotoxins and snake bite venoms. The key to understanding the effects of potential poisons is to recognise that they all have a dose dependant adverse effect - even water can be toxic when administered or consumed in large quantities!
Toxicology is the study of chemicals or substances that can damage tissues or destroy life. Such chemicals and substances are commonly referred to as poisons, and can include plants, pharmacological agents, heavy metals, herbicides, insecticides, rodenticides, mycotoxins and snake bite venoms. The key to understanding the effects of potential poisons is to recognise that they all have a dose dependant adverse effect - even water can be toxic when administered or consumed in large quantities!