The UNEP Common Carbon Metric is a most welcome effort in the measurement of building-related CO₂ emissions .
“Efforts to establish international standards for measuring energy use in buildings have received a boost, after the International Organization for Standardization (ISO) decided to consider an innovative tool developed by the United Nations Environment Programme (UNEP) to gauge energy consumption and CO₂ emissions in homes and offices across the world.
The Common Carbon Metric (CCM) – developed by UNEP’s Sustainable Buildings and Climate Initiative – could form the basis for a new international standard for measuring the environmental performance of existing buildings. The ISO – the world’s largest developer and publisher of international standards, covering 162 countries – will develop relevant methods.
The Common Carbon Metric is intended to create a uniform system for defining the climate impact of buildings through a consistent protocol, which can, in turn, help develop international baselines for use by architects, designers and the construction industry.
Today, the building sector is the single largest contributor to greenhouse gas emissions with about one third of global energy use taking place in offices and homes. Moreover, building-related CO₂ emissions are set to rise from 8.6 billion tones in 2004 to 11.1 billion tones in 2020.”