A one-of-its-kind study commissioned by the state forest department and carried out with the help of IIT Bombay has quantified the value of Sanjay Gandhi National Park, one of those rare forests located within a bustling cityAccording to the study by Haripriya Gundimeda, professor in the department of humanities and social sciences at IIT Bombay, the net asset value of SGNP is a staggering Rs 15.09 lakh crore. And this, mind you, does not include the price of the land on which the forest stands.According to the study, the ecological services that SGNP provides are worth Rs 63,417.5 crore, equal to 15% of Mumbai and Thane’s combined district domestic product and 38% of the industrial output of the two cities for the year 2019-20.