A recent 2025 Supreme Court observation that appears to accept a 100-metre buffer definition around the Aravalli range has revived an old legal memory: the same court had firmly rejected this approach back in 2010. The contrast highlights how environmental jurisprudence around one of north India’s most fragile ecosystems has evolved — and why the shift matters.
What is the Aravalli controversy about?
The Aravalli range, one of the world’s oldest mountain systems, stretches across Rajasthan, Haryana, Delhi and Gujarat. Over decades, the region has faced:
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Mining
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Real estate expansion
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Industrial activity
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Forest degradation
To regulate construction and mining, authorities attempted to define the Aravallis using a fixed-distance rule, most notably a 100-metre criterion from recorded forest or hill features.
What happened in 2010
In 2010, the Supreme Court categorically rejected the 100-metre definition while hearing cases related to mining and environmental clearances in Haryana.
The court held that:
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The Aravallis cannot be reduced to an arbitrary distance measurement
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Ecological features do not follow straight lines or uniform buffers
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Such definitions risk excluding ecologically sensitive zones beyond the fixed distance
The bench warned that mechanical yardsticks could undermine environmental protection by allowing destructive activities just outside the defined perimeter.
Why the court said ‘no’
The 2010 ruling emphasised that:
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Environmental protection must be ecosystem-based, not map-based alone
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Scientific, geological, and ecological characteristics matter more than distance
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States cannot dilute protection through narrow definitions
The judgment became a key reference point in environmental law, reinforcing the precautionary principle.
What changed by 2025
In 2025, the Supreme Court appeared more receptive to a 100-metre criterion, though in a different legal and administrative context.
Key differences include:
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Greater reliance on satellite imagery and GIS mapping
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Updated forest and land-use records
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Court emphasis on administrative clarity and enforceability
Rather than endorsing the buffer as a perfect ecological tool, the court viewed it as a regulatory baseline, not a comprehensive definition.
Why critics are concerned
Environmental groups argue that the shift risks:
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Legalising past encroachments
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Narrowing the scope of Aravalli protection
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Encouraging development just outside buffer zones
They caution that ecological systems like the Aravallis function as connected landscapes, not isolated strips of land.
Supporters’ argument
Supporters of the newer approach say:
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Enforcement needs clear, measurable standards
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Ambiguous definitions lead to legal uncertainty
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A minimum buffer can coexist with stricter protections elsewhere
They argue the 100-metre rule is a starting point, not an endpoint.
The larger legal lesson
The contrast between 2010 and 2025 underscores a broader trend in Indian environmental law:
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From ideal ecological protection
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To pragmatic regulatory frameworks
Courts are increasingly balancing environmental concerns with governance, development, and administrative feasibility.
What lies ahead
Whether the 100-metre approach survives future legal scrutiny will depend on:
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How states implement it
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Whether scientific studies support it
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If courts treat it as a minimum safeguard or a final boundary
For now, the Aravallis remain at the centre of a legal debate that reflects changing priorities — and the tension between ecology and execution.
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