As per IPCC 4th Assessment Report (2007), in 2004, global emissions from the buildings sector (including electricity) were about 8.6 GtC02, 0.1 GtC02-eq N10, 0.4 GtC02-eq CH4and1.5 GtC02-eq halocarbons (including CFCs and HCFCs). Using an accounting system that attributes C02 emissions to electricity supply rather than buildings end-uses, the direct energy-related carbon dioxide emissions from building sector is approx. 3 Gt/yr.
UNEP SBCI (2014) suggest that buildings use about 40% of global energy, 25% of global water, 40% of global resources, and they emit approximately 1/3 of total GHG emissions. The building sector is estimated to be worth 10% of global GDP (USD7.5 trillion) and employs 111 million people1.
IPCC 4th assessment report has also provided projections from building sector upto year 2030. In I PCC 4th assessment report - baseline was derived for this sector based on the literature, resulting in emissions between the 82 and A1B SRES (Special Report on Emission Scenario) with 11.1 Gt of emissions of C02 in 2020 and 14.3 GtC02 in 2030 (including electricity emissions but omitting halocarbons, which could conceivably be substantially phased out by 2030 ).
GHG emission from building sector in India is of specific importance because India is fast developing economy and infrastructure development is happening at very fast pace. McKinsey report in year 2010 estimated that rapid urbanization in the country will require the construction of 700 to 900 million square meters of commercial and residential space, or "a new Chicago everyyear2.
Implementation of 'Greenhouse gas accounting and management in building sector' is a new subject for India and still need awareness and implementation to assess the emissions from this sector. Different approaches being followed, on the basis ofavailability of data or on the basis of use phase of the building.
The aim of approach paper is to suggest possible 'strategies and approaches to develop emission calculation tool for building sector in India'.
To prepare this approach paper, formal invites and ToR were sent to experts to attend working group (WG) meetings. In addition, one to one meeting with various experts was conducted to have their opinion and views.
Approach paper is an outcome of two working group meetings and interaction I discussions with various stakeholders from building sector in India.