The Supreme Court's acceptance of a narrow elevation-based definition of the Aravalli hills in 2025 threatened to render over 90% of the range legally mineable. Critically examine the tension between judicial reliance on technical expert committees and the ecological imperatives of protecting ancient landscapes.

The Aravallis, India's oldest fold mountains stretching across four states, function as a living barrier against Thar desertification and as the recharge spine of NCR's aquifers [1]. The 2025 definition controversy shows that expert-driven metrics aid judicial clarity, but cannot by themselves carry ecological purpose.

Merits of judicial reliance on expert committees

• Courts lack technical competence in geomorphology; a uniform, satellite-mapped criterion replaced four states' divergent standards, ending definitional arbitrage by lessees.
• A measurable threshold — a landform rising 100 m above local relief, with hills within 500 m clustered into a range — makes enforcement (drones, CCTV, weighbridges) administratively auditable [1].
• Expert input enabled operational safeguards: an absolute mining ban in protected areas, eco-sensitive zones, tiger reserves, wetlands and CAMPA sites, plus a freeze on new leases pending ICFRE's science-based Management Plan for Sustainable Mining (MPSM) [1].

Where the technical proxy collided with ecology

• Elevation is a poor proxy for ecological value. Low ridges, scrub and grassland — leopard and hyena habitat and prime recharge zones — fail a height test yet perform the desertification-barrier function [1].
• A definition excluding the bulk of mapped hills converts a conservation instrument into a mining licence, inverting Articles 21 and 48-A.
• Committee outputs are advisory inputs, not verdicts; the Court itself later noted its recommendations had been misconstrued, taking suo motu cognisance [2].
• Narrow definitions weaken India's Land Degradation Neutrality commitments and NCR's air quality.

Course correction The Court stayed its own order and constituted a high-powered committee under the ICFRE Director General for independent, time-bound review [3]; the Centre concurrently assured no new leases in ecologically sensitive stretches [4].

Expertise must inform judicial reasoning, not substitute for it. Where an ancient landscape is at stake, the precautionary principle should govern: definitions built on ecological function rather than elevation alone, adopted after public consultation on the MPSM, can align mineral needs with the Court's own environmental jurisprudence.