The campus of the Centre for its R&D activities is located at the 19^th milestone on the Gurgaon-Faridabad road which is about 25 km south of main office of the Ministry. The surrounding area is predominantly agricultural and beautiful green or yellow fields can be seen around the Campus depending upon the season. The main approach to the Campus passes through the Arawalis, which are considered to be the oldest mountain range in India. Covering an area of about 81 hectares, the campus receives abundant sunshine for experimenting with the energy from the sun. The buildings of the Centre have been constructed using solar passive techniques to achieve energy efficiency and environmental friendliness.