Life cycle C02 emission from the buildings are analyzed. At the first part, C02 emission from the manufacturing process of building materials are analyzed. And the unit value of C02 emission per weight which include recycle materials are presented. At the second part, the effect of using recycle materials for buildings are analyzed. At the third part, from view point of building total life cycle (from material manufacturing, transportation, construction, operation, maintenance, reform, to demolishing), CO2 emission prediction method is presented. Finally, using this method, concrete restrain means of C02 emission from building life cycle are discussed.
