Chlorine (Cl₂) is widely used for disinfection and sanitation purposes and is relevant in hospitality, water treatment, manufacturing and sterilisation industries.
Carbon Monoxide (CO) is a colourless, odourless, and potentially deadly gas and is highly relevant to boiler engineers, as well as to work involving fuel appliances and confined spaces.
Carbon Dioxide (CO₂) is relevant across a wide range of industries, including brewing, refrigeration, the food and drink industry, manufacturing and hospitality.