<prompt> Green-house gases not include:Carbon dioxideCarbon monoxideWater vapourMethane  <response>: Global warming Green house effect is caused by heat-trapping gases in the atmosphere released by burning of fossil fuels, depletion of ozone layer, dt use of aerosolized chloro-fluoro-hydrocarbons etc. By their contribution to greenhouse effect on eah, 4 major gases: Water vapour, 36-70 Carbon dioxide 9-26 Methane 4-9 Ozone 3-7 