||East-West Environment and Policy Inst., Honolulu, HI. ;Oregon Graduate Inst. of Science and Technology, Beaverton. ;Philippines Univ., Diliman, Quezon City. Coll. of Engineering. ;Lawrence Berkeley Lab., CA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Samples were taken of the combustion gases released by household cookstoves in Manila, Philippines. In a total of 24 samples, 14 cookstoves were tested. These were fueled by liquefied petroleum gas (LPG), kerosene (three kinds of stoves), charcoal, and wood. Ambient samples were also taken. All samples were analyzed for CO2, CO, CH4, N2O, and total non-methane organic compounds (TNMOC). Results generally confirm increasing emissions for most products of incomplete combustion moving down the 'energy ladder' from gaseous to liquid to processed solid to unprocessed solid fuels. When weighted by global warming potentials, the greenhouse impact of the emissions of non-CO2 greenhouse gases from wood combustion may rival or exceed those from CO2 alone. If verified, this could have substantial implications for energy and environmental policies in developing countries. These tentative findings indicate that more measurements of this type in developing countries would be justified.