'Swachhata Green Leaf Rating System' starts in Kaziranga Guwahati: In a first in the northeast, ‘Swachhata Green Leaf Rating System’ was successfully rolled out at the Kaziranga National Park and Tiger Reserve (KNPTR) on February 22. The ‘Swachhata Green Leaf Rating System’ was jointly initiated on December 14 last year by the ministry of jal shakti and the ministry of tourism, Government of India.