Nitrous oxide is used during 80 per cent of childbirths. This gas is a green-house gas 310 times stronger than carbon-dioxide and one kilogram that is emitted into the atmosphere is equivalent to 1500 kilometres of driving a car. Region Skåne, the regional health care management organization of southern Sweden has installed equipment from the company Nordic Gas Cleaning for separating the nitrous oxide into oxygen and nitrogen at all of its five hospitals with birth clinics. This has not only reduced emissions by 99 per cent.