Abstract: Indoor and outdoor air pollution have become a public health challenge in Sri Lanka, majorly with the introduction of open economic policy in 1978. The emissions from motor vehicles (55%), industries (25%) and domestic sources (20%) collectively contributed to air pollution (Ministry of Environment, 2012). Sri Lanka produced over 90% of power demand from hydroelectricity two decades before and it was gradually reduced to 40-50% approx. as of now, due to the usage of thermal and coal power plants to produce electricity.