Deep-Sea Discovery, Environmental Responsibility

19 Sep Deep-Sea Discovery, Environmental Responsibility

UPSC GS Paper III — Environment + Science & Technology

Why is it in the News?

India is expanding its scientific and technological capabilities to explore the deep ocean and its mineral resources. The The Hindu editorial raises an important question: Does technological ability to exploit deep-sea resources necessarily mean that these resources should be commercially exploited?

India currently has exploration contracts under the International Seabed Authority (ISA) and is developing technologies for deep-sea exploration and mining. At the same time, scientific surveys are revealing that deep-sea ecosystems contain biodiversity that remains poorly understood.

Therefore, the debate is no longer simply about technological feasibility. It is increasingly about environmental responsibility, precaution, biodiversity conservation and the long-term value of marine ecosystems.

India’s Growing Deep-Sea Footprint

India has been involved in seabed mineral exploration for several decades.

According to the editorial, India has three ISA exploration contracts covering approximately 95,000 sq km across the Central Indian Ocean Basin, Central Indian Ridge and Carlsberg Ridge.

The exploration has identified an estimated 366 million tonnes of polymetallic nodules containing minerals such as:

• Nickel
• Copper
• Cobalt
• Manganese

Government data separately confirms that India’s allocated area in the Central Indian Ocean Basin contains an estimated 366 million metric tonnes of nodules, with average concentrations of approximately 0.14% cobalt, 1.14% nickel, 1.09% copper and 25.2% manganese.

These minerals have strategic importance for batteries, renewable-energy technologies, electric mobility and advanced manufacturing.

What are Polymetallic Nodules?

Polymetallic nodules are mineral-rich formations found on or near the deep-ocean seabed.

They generally contain several economically important metals, particularly:

Manganese + Nickel + Copper + Cobalt

Their significance has increased because these minerals are important for modern technologies such as batteries, electric vehicles, renewable-energy systems and advanced electronics.

However, the presence of valuable minerals does not automatically make mining environmentally sustainable.

Deep-sea ecosystems are characterised by low temperatures, high pressure, darkness and very slow biological processes. Consequently, disturbances may have effects that are difficult to predict and potentially difficult to reverse.

What is Deep-Sea Mining?

Deep-sea mining refers to the extraction of mineral resources from the seabed at great depths.

Three broad categories of seabed mineral resources are particularly important:

1. Polymetallic Nodules

Found mainly on abyssal plains and contain manganese, nickel, copper and cobalt.

2. Polymetallic Sulphides

Generally associated with hydrothermal vents and can contain copper, zinc, gold and other minerals.

3. Cobalt-Rich Ferromanganese Crusts

These occur on underwater mountains and can contain cobalt, nickel, manganese and other metals.

Under UNCLOS, mineral resources in the international seabed area fall under a special legal regime. The “Area” refers to the seabed, ocean floor and subsoil beyond national jurisdiction. Its resources are recognised as the common heritage of humankind.

International Seabed Authority: Why is it Important?

The International Seabed Authority (ISA) is an autonomous international organisation established under the United Nations Convention on the Law of the Sea (UNCLOS).

Its headquarters are in Kingston, Jamaica.

The ISA is responsible for organising and regulating mineral-related activities in the international seabed area and for ensuring that such activities are conducted for the benefit of humankind as a whole.

Therefore, the ISA is important because the international seabed cannot simply be treated as the sovereign territory of individual countries.

Prelims Point

ISA ≠ UNCLOS

• UNCLOS → international legal framework for oceans.
• ISA → institution established under UNCLOS to regulate activities concerning mineral resources in the international seabed “Area”.

India and the Deep Ocean Mission

India launched the Deep Ocean Mission (DOM) to strengthen its capabilities in deep-sea exploration, scientific research, biodiversity assessment and technological development.

The mission involves areas such as:

• Deep-sea mining technology
• Manned submersible technology
• Underwater robotics
• Deep-sea biodiversity
• Ocean climate studies
• Marine biotechnology

One major component is MATSYA-6000, a human-occupied deep-sea submersible designed to carry humans to depths of around 6,000 metres.

The National Institute of Ocean Technology (NIOT) has also tested a deep-sea mining machine at approximately 5,270 metres. Government data says the machine is being developed to support harvesting of polymetallic nodules from depths of up to 5,500 metres.

Science is Revealing the Hidden Biodiversity

The environmental debate becomes particularly important because the deep ocean remains one of Earth’s least understood ecosystems.

According to the editorial, biodiversity surveys across 19 seamounts have studied around 1,300 deep-sea organisms, including nearly 23 species reported as new to science.

This creates a fundamental policy dilemma.

On one hand, deep-sea minerals could support India’s clean-energy transition and strategic requirements.

On the other hand, large-scale seabed disturbance could affect organisms and ecological processes that science does not yet fully understand.

Therefore, more scientific knowledge should precede irreversible environmental intervention.

Why is Deep-Sea Mining Environmentally Sensitive?

1. Destruction of Seabed Habitat

Mining machines can physically disturb the seabed and destroy habitats supporting specialised organisms.

2. Sediment Plumes

Mining activities can generate sediment plumes that may spread beyond the immediate mining area and affect marine organisms.

3. Biodiversity Loss

Deep-sea ecosystems contain species that are still being discovered. Their ecological roles are not always known.

4. Slow Recovery

Many deep-sea organisms grow and reproduce slowly. Therefore, ecosystem recovery after major disturbance may take extremely long periods.

5. Food-Web Disruption

Removing or disturbing organisms at the base of deep-sea ecosystems could potentially affect wider ecological relationships.

6. Carbon and Biogeochemical Cycles

Deep-ocean ecosystems participate in important biogeochemical processes. Disturbance may have implications that are not yet fully understood.

The Critical Minerals Argument

The case for deep-sea exploration is also connected with the global demand for critical minerals.

Nickel, cobalt, copper and manganese are important for several modern industries.

Their demand is expected to remain significant because of:

• Electric vehicles
• Battery storage
• Renewable energy
• Grid infrastructure
• Electronics
• Defence technologies
• Advanced manufacturing

Consequently, countries are looking for diversified sources of critical minerals.

However, deep-sea mining should not automatically be considered the solution to critical-mineral security.

Alternative strategies include:

Recycling + Resource Efficiency + Material Substitution + Urban Mining + Domestic Exploration + Circular Economy

India’s Strategic Interest

India’s interest in deep-sea resources is not limited to mineral extraction.

Resource Security

Access to critical minerals can support India’s energy transition and advanced manufacturing ambitions.

Technological Capability

Deep-sea exploration requires expertise in robotics, materials science, navigation, communication and pressure-resistant engineering.

Blue Economy

The deep ocean is an important component of India’s broader Blue Economy strategy.

Scientific Knowledge

Deep-sea research can improve India’s understanding of marine biodiversity, climate systems and ocean processes.

Strategic Autonomy

Indigenous ocean technologies can reduce dependence on foreign technological capabilities in strategically important areas.

Exploration Does Not Mean Exploitation

One of the most important conceptual distinctions in this editorial is:

Exploration ≠ Exploitation

Exploration can generate:

• Scientific knowledge
• Biodiversity data
• Environmental baselines
• Geological information
• Technological capabilities

Commercial exploitation, however, involves physical extraction and therefore carries potentially greater environmental risks.

The editorial argues that India has an opportunity to use the exploration phase to establish strong environmental safeguards before making decisions about commercial exploitation.

This approach is closely linked with the precautionary principle: where serious environmental risks exist and scientific knowledge is incomplete, lack of complete certainty should not automatically justify environmental intervention.

Deep Ocean vs Sustainable Development

The deep-sea mining debate illustrates a larger development dilemma:

How can societies meet growing demand for resources without continuously expanding the ecological footprint of extraction?

Sustainable development requires more than finding new sources of minerals.

It also requires reducing unnecessary resource consumption through:

• Recycling
• Reuse
• Resource efficiency
• Circular economy
• Material substitution
• Sustainable consumption

Therefore, the deep-sea debate can be connected with India’s Mission LiFE — Lifestyle for Environment.

Way Forward

1. Strengthen Environmental Baselines

Before any large-scale exploitation, India should continue long-term biodiversity and ecosystem monitoring.

2. Follow the Precautionary Principle

Where scientific uncertainty is high and environmental damage may be irreversible, decision-making should remain cautious.

3. Separate Exploration from Commercial Exploitation

Scientific exploration should not automatically create an assumption that commercial mining must follow.

4. Strengthen Environmental Impact Assessment

Deep-sea projects require comprehensive assessment of sediment plumes, biodiversity, noise, habitat destruction and cumulative ecological effects.

5. Promote Circular Economy

Critical-mineral security should include recycling, urban mining, efficient material use and substitution.

6. Strengthen International Cooperation

India should actively participate in ISA negotiations and contribute scientific data to global deep-ocean governance.

7. Improve Scientific Capacity

India should invest in marine biology, oceanography, underwater robotics, autonomous vehicles and deep-sea environmental monitoring.