Syllabus: Environment
Source: IE
Context: A new study published in Nature reveals that a Pacific Ocean seabed mined in 1979 has not recovered after 40+ years, raising alarm over the long-term ecological impact.
- This comes amid global discussions at the UN’s International Seabed Authority (ISA) on regulating or halting deep sea mining activities.
What is Deep Sea Mining?
- Definition: Extraction of mineral-rich nodules, sulphides, and crusts from the ocean floor at depths of over 200 meters.
- Methods:
- Using robotic vehicles to collect polymetallic nodules like a plough.
- Employing AI-controlled machines and vacuum pumps to extract minerals.
- Processing is done on surface vessels; waste discharge is often returned to the sea.
- Resources Targeted: Cobalt, nickel, lithium, rare earths, gold, copper—essential for EVs, solar panels, wind turbines, and electronics.
- Distribution:
- Richest deposits in Clarion-Clipperton Zone (Pacific Ocean).
- Also found near hydrothermal vents and seamounts.
- Technological Frontier: Techniques are still experimental; most operations remain in exploratory phase.
Current Status of Deep-Sea Mining:
- Commercial mining not yet started; only small-scale tests have been conducted.
- ISA Regulation pending: Deadline to finalize rules is set for 2025.
- UNCLOS Oversight: High-seas mineral wealth is designated as the “common heritage of mankind”.
Benefits of Deep-Sea Mining:
- Critical Mineral Supply: Can meet surging global demand for EVs and green tech.
- Alternative to Land Mining: Avoids deforestation and freshwater contamination from terrestrial mining.
- Controlled Labor Conditions: Offshore mining could reduce human rights violations seen in land-based mining.
- Strategic Security: Reduces reliance on geopolitically sensitive land reserves.
E.g. Demand for cobalt is expected to rise by 400-600% by 2040 due to clean energy transitions.
- High Resource Concentration: Polymetallic nodules offer rich deposits in compact areas.
Impacts of Deep Sea Mining:
- Ecological Damage: Physical disturbance can destroy fragile ecosystems and smother marine life.
E.g. The new study found no biological recovery after 44 years in an 8-metre-wide mining site in the Pacific.
- Species Loss: Many deep-sea species are rare, slow-reproducing, and nodule-dependent—mining risks extinction.
- Food Chain Disruption: Waste plumes can affect fish species crucial for fisheries in Pacific Island nations.
- Carbon Cycle Threat: Disturbance of deep-sea life can reduce ocean’s carbon absorption capacity.
- Social Inequity: Benefits may be skewed towards developed nations or private corporations.
Way Ahead:
- Scientific Pause & Research First: Impose a precautionary moratorium until robust ecological data is available.
- Develop Inclusive Regulations: ISA must create transparent, enforceable laws with equitable benefit sharing.
- Promote Circular Economy: Boost battery recycling and recover minerals from e-waste and mine tailings.
- Explore Alternate Tech: Support sodium-ion batteries and LFP batteries that reduce need for cobalt/nickel.
- Global Collaboration: Engage all stakeholders—scientists, policymakers, coastal nations—for sustainable ocean governance.
Conclusion:
Deep sea mining presents a paradox—promising resources for green energy but risking irreversible ecological damage. The world must balance economic ambition with planetary responsibility. Only a science-led, equitable, and precautionary approach can safeguard ocean ecosystems while meeting global energy goals.
PYQ:
- Critically evaluate the various resources of the oceans which can be harnessed to meet the resource crisis in the world. (UPSC-2014)
