Sustainability
social, economic, environmental impact <ref>Ranasinghe ,WC and Hemakumara, GPTS(2018),  Spatial modelling of the householders' perception and assessment of the potentiality to improve the urban green coverage in residential areas: A case study from Issadeen Town Matara, Sri Lanka, Ruhuna Journal of Science,Vol 9(1); http://rjs.ruh.ac.lk/index.php/rjs/article/view/174</ref>