By Oluwatope Lawanson Lagos, Feb. 2, 2021 Deputy Gov. Obafemi Hamzat of Lagos State on Tuesday said that effective mortgage system would be a sustainable solution to housing deficit in Nigeria. Hamzat said this when management teams of Echostone Development Nig. Ltd. and IFC Edge paid him a courtesy visit at Alausa in Ikeja. The News Agency of Nigeria reports that Echostone Development is a real estate development company that provides an innovative housing system to address large scale housing shortages. IFC Edge is a member of the World Bank group that provides technical advisory to its investment clients, and advisory for the building sector.