Climate change is being driven by global warming which is caused mainly by greenhouse gas emissions from human activities. Buildings contribute significantly to greenhouse gas emissions through their operations and electricity usage for HVAC equipment. As developing countries like India experience rapid growth and construction of new buildings, the emissions from building HVAC systems are projected to rise substantially and comprise a larger share of countries' total emissions over time if no action is taken. More sustainable 'green' building practices that improve energy efficiency can help reduce the environmental impacts of buildings and their HVAC systems.