In this process oxygen is released into the atmosphere. Without this natural process, life as we know it could not exist. Putrefying organic materials and the burning of wood, paper and other organic matter also emit CO2. In stationary combustion, gas, heating oils and kerosene are forms of energy sources emitting CO2. Water vapour and CO2 are the major natural greenhouse gases of the atmosphere.
Water vapour is the most important green house gas.
The atmosphere contains approximately 0.03 per cent CO2. With an increase of CO2, it is likely that the storing capacity of energy in the atmosphere will be affected. Per capita this is rather high, 3.83 tonnes as carbon per year. Global average is 1.12 tonnes per capita. Burning of natural gas accounted for 43 per cent of Norwegian stationary emissions in 1989.