7. Green House Gases (GHGs) SIX types of greenhouse gases with different Global Warming Potential (GWP). Usually expressed in CO2-equivalent : Carbon dioxide GWP: 1 Hydrofluorocarbons GWP: 11,700 Methane GWP: 21 Sulphur hexafluoride GWP: 23,900 Nitrous oxide GWP: 310 Perfluorocarbons GWP: 9,200
8. Sector wise Energy Consumption of Pakistan Source: Pakistan Energy Yearbook 2008
The Green House Effect Some gases like CO 2 , Methane, N 2 O, Chlorofluorocarbons (CFCs) etc. naturally exist in the atmosphere, the so called Green House Gases (GHGs) that form a blanket surrounding the earth and keeps the earth warmer. This is called Green House Effect . The Enhanced Green House Effect Human activities (fossil fuel burning, depletion of sinks like forests etc.) has been increasing the concentration of GHGs in the atmosphere and is leading to rise in temperatures . This is called Enhanced Green House Effect. Global Warming/Climate Change The phenomena of a rise in global temperatures of earth and other associated climatic changes as caused by the Enhanced Green House Effect is called “Global Warming” and in broader term “Climate Change”.