Josh Shackleton was crowned Young Environmentalist of 2008.
The 14-year-old pupil at Ravens Wood School in Oakley Road, Bromley, has chaired the borough’s Youth Advisory Panel since 2006, helping the council provide environmental activities for 11 to 19-year-olds.
This has included the initiation of a project to turn a piece of land near Mead Road Infant School in Chislehurst into a wildlife area.
The Beverley Road resident said: “For me to get this award means a lot to the teenagers of my generation, as it gets rid of the stereotype we’re all hoodies with knives and drugs, and shows there are many of us who care about the world around us. Hopefully this award will inspire others.”