The fire protection system's main goal should be to detect and alert of fire in the early stages, then bring fire under control without disrupting the flow of business and without threatening the personnel in the facility. Server room fire suppression technology has been around for as long as there have been server rooms. Traditionally, most computer rooms used Halon gas, but this has been shown to be environmentally unfriendly (ozone depleting) and unsafe for humans. Modern computer room use combinations of inert gases such as Nitrogen, Argon and CO2. Other solutions include clean chemical agents such as FM200 and also hypoxic air solutions that keep oxygen levels down.