《Table 6 Comparison of studies on life cycle carbon emissions》

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《Life cycle carbon emission assessment of a multi-purpose university building:A case study of Sri Lanka》

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Note:*GHG values are given（kg·m–2CO2eqper year）.

Also，carbon emissions can be controlled by reducing energy and resource consumption of a building by innovative technologies and management，such as optimizing design schemes and construction methods and enhancing 3R（reduction，reuse and recycle）principles at each stage.Emphasis of 3R should be placed on high carbon impact materials such as concrete，reinforcement steel and aluminum due to their high contribution to carbon emissions at the material production stage as shown in Table 2.Cleaner production technologies for building materials and use of green building materials are already being promoted in Sri Lanka through GREENSLRating System and green labeling system（Green Building Council Sri Lanka，2015）.