OAS1S™ is the innovative concept for the number 1 green architecture. br With the unique design of houses as trees and the design of communities as forests. br With the most sustainable, desirable and feasible answer to our urbanizing world of today. br With the mission to improve our concrete cities by top-quality and 100 green homes.br OAS1S™ creates the 21st century icon that merges architecture and nature into 1.