An Indian man walks down a path in a clearing at the Sanjay Van forest reserve in New Delhi on June 25, 2011. Sanjay Van, a forest reserve sprawled across some 630 hectares and managed by the Delhi Development Authority, is part of the south central area of the greater Delhi Ridge. The northernmost tip of the now-eroded 1.5 billion year-old Aravalli range, which stretches some 800 kilometres across western India's Rajasthan, Haryana and Gujarat states, ends in the Delhi ridge which acts as a green lung for the Indian capital. AFP PHOTO/TENGKU BAHAR (Photo credit should read TENGKU BAHAR/AFP/Getty Images)