Student volunteers of Center for Sustainability Solutions (CSS) participated a GREEN WALK 2018 coordinated by the Green Building Council of Sri Lanka on 09th of June 2018. This was approximately 4 km walk in the vicinity of the heart of Colombo Sri Lanka, to promote the green concepts. Aims of this campaign were public awareness on the green and sustainability practices, social gathering of green minded organizations and people and enhancing the green network of Sri Lanka