New Delhi, Mar 08 (ANI): Art of Living founder Sri Sri Ravi Shankar on Tuesday said not even one tree had been cut for the arrangement of the World Cultural Festival event. He added that they will convert the area into a beautiful biodiversity park, adding that since 2010, his volunteers have cleaned 512 tonnes of waste products put inside the river. He stated that the enzyme technology they are using is proven and his being used in many counties, including Japan and Singapore.