Aravalis are the oldest mountain chain in the world. The range of these mountains falls under arid and semi-arid regions of India in the states of Gujrat, Rajasthan, Haryana ending in national capital Delhi. The best forests of these mountains comprise of Annogeissus pendula and its associates. But now most of the forests have been invaded by Procopis juliflora.Fuelwood collection, grazing and invasion by Procopis juliflora are major causes of forest do. 
Lots of regular water streams and falls used to be there in Aravalis of Haryana State. But due to degradation of forests, the water in most of the streams have dried and others the discharge has come at a point of extinction of these water streams or falls.

XXV IUFRO WORLD CONGRESS