The electricity demand and supply gap in Pakistan has reached 6,000 MW, for which the Government of Pakistan has planned some power generating projects. Environmental feasibility analysis is done for one of these projects. The Government of Pakistan has planned to build a coal-based mega power plant project of 6,600 MW capacity at Gadani, Karachi. Coal for this project will be imported from South Africa, Indonesia and Australia, even though Pakistan also has huge reserves of coal at Thar, Sindh. CO2 of 208.92-804.02 tons/GWh and SO2 emissions of 3.73-14.55 tons/GWh are estimated from this project using stoichiometric calculations. Renewable energy potential of Pakistan is presented in order to discourage the Government of Pakistan on these environmental unfriendly projects. Solar, wind, biomass and hydro electric energy options are encouraged to invest in as they are sustainable and environment friendly.