Get latest articles and stories on Business at LatestLY. New Delhi [India], June 5: Smiling Tree celebrated World Environment Day today. Dr Mukesh Kwatra, founder of Smiling Tree, engaged some young green warriors by displaying a demo model for water harvesting where rain and waste water is collected, stored and later used for productive purposes like gardening, washing clothes and cars etc. Business News | World Environment Day Smiling Tree Promotes Water Conservation by Displaying a Demo Model for Water Harvesting.