Noxious weed means a plant that when established is highly destructive, competitive, or difficult to control by cultural or chemical practices.
Noxious weeds or "weeds" means any exotic plant species established or that may be introduced
Dangerous Substance means any radioactive emissions and any natural or artificial substance (whether in solid or liquid form or in the form of a gas or vapour and whether alone or in combination with any other substance) which, taking into account the concentrations and quantities present and the manner in which it is being used or handled, it is reasonably foreseeable will cause harm to man or any other living organism or damage to the Environment including any controlled, special, hazardous, toxic, radioactive or dangerous waste.
odour nuisance means a continuous or repeated odour, smell or aroma, in an affected area, which is offensive, obnoxious, troublesome, annoying, unpleasant or disagreeable to a person:
Odor means that property of an air contaminant that affects the sense of smell.