For centuries, Delhi has been the seat of various dynasties. The river Yamuna and the natural forest cover, virtually running through three parts of the city, made the perfect setting. Today, it's a different story. The river is dead, the forest cover is fast dwindling and a population of 14 million is gate-crashing into neighboring states. In the last 50 years Delhi has lost about 80 per cent of forest cover on the Aravalli ridge, the only natural forest here.