MANGALURU: In the heart of Mangaluru, a four-acre plot near Mangala Stadium was transformed into a lush green butterfly park by two enthusiastic morning walkers. In 2017, Raviraj Shetty and MD Sreekumar, who were regular morning joggers started working on clearing the space next to Karavali Utsav ground. Dumpyard to butterfly park “There was always garbage on the basketball court …