The Aravalli Range is at the center of a debate following a Supreme Court ruling defining protected hills by a 100-meter local relief criterion. This new standard, measured from surrounding terrain rather than sea level, differs from previous methods like the Forest Survey of India's approach. Environmentalists express concern that this could reduce protection for many Aravalli hills, particularly in Rajasthan, impacting mining and construction activities across Delhi NCR, Haryana, and Rajasthan.