how many invention's and discoveries did ben franklyn have?
Cos we like to be different, laws in the UK say that lights or any reflective materials on the rear of a vehicle cannot be white, many roads are very narrow, so it was decided that yellow was the best colour, its been like that since 1968.
we do not have them just fire extinguishers - chubb usually make them they are all different colours depending on what type of fire they can be used for. eg a black one is for an electrical fire. when we do have fires normally they just plug the hose into a water main under a man hole in the street.