Dr. S. Chakravarthy, IAS (Retd.) Former Special Chief Secretary, Govt. of AP, Member of MRTP Commission, GoI and Honorary Adviser of APTDC delivering keynote address  at the Inaugural Session of the International Symposium on Solid Waste Management 2011  “Sustainable Solutions for Clean and green Earth”, held on 6-7 December 2011, at Hyderabad.