Chuck Leavell, the keyboardist for the Rolling Stones, the Director of Environmental Affairs for the Mother Nature Network (MNN), the premier source for news and information on environmental issues, Chuck works to inform and educate people on green issues. Chuck Leavell, the keyboardist for the Rolling Stones, the Director of Environmental Affairs for the Mother Nature Network (MNN), the premier source for news and information on environmental issues, Chuck works to inform and educate people on green issues.