360° UPSC Mains Analysis

Supreme Court quashes 2021 OM allowing ex post facto environmental clearance, but upholds Centre’s power to provide ‘amnesty schemes’

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Flora & Fauna

Asian Elephant (Elephas maximus)
Status: Endangered
Threat: Linear infrastructure projects like highways and railways, which often bypass prior environmental clearances, fragment their migratory corridors and lead to fatal collisions.
Great Indian Bustard (Ardeotis nigriceps)
Status: Critically Endangered
Threat: Unregulated development of power transmission lines and renewable energy infrastructure in grassland habitats, often regularized retrospectively, poses severe collision risks.

Ecology Impact

The quashing of the 2021 Office Memorandum (OM) prevents the unchecked expansion of large-scale infrastructure projects (such as highways, mining, and ports) in ecologically sensitive areas without prior Environmental Impact Assessment (EIA). This safeguards critical habitats, National Parks, and Wildlife Sanctuaries from irreversible ecological degradation caused by unauthorized construction. However, the prospective nature of the ruling and the validation of existing ex post facto clearances mean that previously compromised ecosystems will not receive immediate restorative relief.

Science & Tech Angle

The underlying science involves Environmental Impact Assessment (EIA) methodologies, which utilize remote sensing, Geographic Information Systems (GIS), and predictive ecological modeling to assess the baseline environmental status and potential impacts of a project before construction begins. Ex post facto clearances bypass this predictive science, making it impossible to establish pre-project baselines or implement effective mitigation hierarchies (avoid, minimize, restore, offset).

Climate Change Link

By mandating prior environmental clearances under the EIA Notification, 2006, the judgment ensures that the carbon footprint and climate vulnerability of major projects are evaluated before construction begins. This aligns with India's Nationally Determined Contributions (NDCs) under the Paris Agreement to reduce emission intensity and create additional carbon sinks. Unregulated infrastructure development, which would have been regularized under the 2021 OM, often leads to deforestation and increased greenhouse gas emissions.

Sustainable Development

The judgment directly supports SDG 15 (Life on Land) and SDG 13 (Climate Action) by reinforcing the legal necessity of prior environmental assessments. It balances the 'polluter pays' principle with the 'precautionary principle,' ensuring that economic growth and infrastructure development (SDG 9: Industry, Innovation, and Infrastructure) do not occur at the cost of environmental sustainability.

International Frameworks

Convention on Biological Diversity (CBD)
Article 14 of the CBD mandates Contracting Parties to introduce appropriate procedures requiring environmental impact assessment of proposed projects that are likely to have significant adverse effects on biological diversity.
Paris Agreement
Requires parties to implement climate mitigation and adaptation measures; prior environmental clearances ensure that large-scale infrastructure projects do not undermine national carbon sink targets and climate resilience.
Rio Declaration on Environment and Development
Principle 15 (Precautionary Principle) and Principle 17 (Environmental Impact Assessment) are directly upheld by the Supreme Court's rejection of perpetual ex post facto clearances.

Sources consulted

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