Cannabis: Cannabis is a tobacco-like greenish or brownish material made of the dried flowering tops and leaves of the cannabis (hemp) plant. Cannabis resin or “hash” is the dried black or brown secretion of the flowering tops of the cannabis plant, which is made into a powder or pressed into slabs or cakes. Cannabis oil or “hash oil” is a liquid extracted from either the dried plant material or the resin.
It causes increased appetite and pulse rate. Users also have problems performing physical and intellectual tasks such as driving a car and thinking logically. Cannabis smoke contains 50 per cent more tar than high-tar cigarettes, which puts users at an increased risk of lung cancer and other respiratory diseases.