The Indian Institute of Technology Madras (IIT Madras) researchers predict that Chennai could cumulatively emit 231.9 million tonnes of carbon dioxide (Co2) by 2040 from the construction and operations of buildings alone owing to rapid urbanisation.
The researchers suggest that switching to renewable sources of energy for operational requirements of buildings would be a key driver in reducing emissions from Chennai.
The study was conducted by a team of researchers from the Centre for Technologies for Low Carbon and Lean Construction, IIT Madras, and the Indo-German Centre for Sustainability (IGCS) IIT Madras, comprising Prof. Ashwin Mahalingam, Department of Civil Engineering, IIT Madras, and Mr. Pokhraj Nayak, former student, IIT Madras.
Explaining the significance of this study, Prof. Ashwin Mahalingam, Department of Civil Engineering, IIT Madras, said, “In order to achieve our emissions targets, we need to benchmark what our ‘business as usual’ emissions are likely to be in future and work backwards. This study represents a step in trying to quantitatively address this problem.”
Rapid urbanization is likely to lead to an increase in built stock across the country. In India, the building industry is estimated to account for around a quarter of total CO2 emissions. This is mainly due to the emissions that arise out of production of raw materials (such as cement & steel), their transportation to construction sites, energy used during construction and most importantly, the energy used during operation of buildings.
IIT Madras researchers have conducted a quantitative study to address the issue of increasing CO2 emissions due to the construction of buildings.The researchers undertook the study in three phases. In the First phase the team leveraged geo-spatial modelling techniques to simulate how Chennai would look in 2040. Further, the researchers used Life Cycle Analysis (LCA) techniques to understand the extent of carbon emissions that Chennai would accrue due to urbanisation. Following which the team developed several scenarios where alternative building materials and energy sources are used in Chennai’s development to evaluate technologies that could lead to the largest reduction in emissions.
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