Ken Yeang (6 October 1948) is an architect, ecologist, planner and author from Malaysia, best known for his ecological architecture and ecomasterplans that have a distinctive green aesthetic. He pioneered an ecology-based architecture (since 1971), working on the theory and practice of sustainable design. The Guardian newspaper (2008) named him "one of the 50 people who could save the planet". Yeang's research and technical work is in ecological architecture and masterplanning, establishing the formal basis for design, focussing on the biointegration of the human-made with nature, creating hybrid systems as ‘constructed ecosystems’. His work adopts bioclimatic design (climate-responsive passive low-energy) as a subset to ecological design, providing for him an underlying armature for ecological design. The approach also engenders critical regionalist features where climatic responses provide the links to its locality.