New Delhi:Union Environment Minister Anil Madhav Dave on Wednesday called for establishing International Clean Energy Data-Grid and said that data on green and unclean energy should be in public domain. "The world will have to understand the difference between clean and unclean energy. The data on green energy and unclean energy should be made available in the public domain," Dave said while speaking at a day-long national conference on 'Energy Data: Management, Modelling and GIS Mapping' organised by NITI Aayog. Dave said that the data must pertain to both, production as well as consumption patterns of a society. "Facts projected through correct data will lead us in the right direction," Dave said. He also lauded Prime Minister Narendra Modi's initiative to establish an International Solar Alliance. “Solar energy is the answer to energy requirements of the future. Disciplined consumption of energy in every field is very much necessary,” he added.