Certain hazardous sports and activities are excluded from personal accident insurances, as they are high-risk pursuits not undertaken by all policyholders. Those who run the excluded risks can usually ‘buy them back. The ‘pursuits’ include: aviation (other than as a passenger on normal flights); hunting and polo; football; motorcycling; mountaineering involving the use of ropes; winter sports and others.
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Certain sports and activities are termed hazardous pursuits and are excluded from travel insurances although it may be possible to have them included on payment of an additional premium.

Waste containing any substance that may create danger to: (a) the life or health of people or animals when released into the environment; or (b) to the safety of humans or equipment in disposal plants if incorrectly handled. Hazardous waste may be toxic (most pesticides, lead salts, arsenic compounds, cadmium compounds, cattle dip); flammable (e.g. hydrocarbons); corrosive (e.g. acids, alkalines); oxidising (e.g. nitrates, chromatic). Insureds knowingly involved with hazardous waste must disclose it as material fact.
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Term generally used to refer to pollutants or contaminants that result from industrial processing and must be disposed.