Why in News: Global shipping is moving towards decarbonisation by 2040–2050, with green fuels like methanol and ammonia emerging as key alternatives to fossil-based marine fuels.
Global Context
- Global shipping targets net-zero emissions by 2040–2050.
- Transition fuels: LNG, followed by green methanol, green ammonia, and biofuels.
- Green methanol is preferred currently due to easier handling vs ammonia.
Green Fuels: Production & Characteristics
- Green hydrogen: Made from water electrolysis using renewable energy.
- Green ammonia: Green H₂ + nitrogen → stable fuel, zero emissions.
- Green methanol: Green H₂ + captured CO₂ from industries; nearly drop-in replacement for existing fuels.
India’s Decarbonisation Strategy
- Target: Green domestic shipping + green fuel bunkering hubs at Tuticorin & Kandla.
- India plans to export green fuels to Singapore, a major bunkering station.
- Leverages its solar capacity (grew from 2.82 GW in 2014 to 105 GW in 2025).
Enabling Factors for India
- Sovereign guarantees: Lower risk, cheaper global financing (~4% interest).
- PLI scheme for electrolysers: Strengthens domestic supply chains.
- CCUS incentives: Promote green methanol from captured industrial CO₂.
- Goal: Create marine green fuel hubs integrated with renewables & industry.
Significance of Decarbonisation in the Shipping Sector
Environmental Necessity
- Shipping accounts for ~3% of global GHG emissions, comparable to large industrialised nations.
- Without action, emissions may rise to 17% by 2050, derailing climate targets.
- Also reduces air pollutants like sulphur and nitrogen oxides, improving public health.
Economic Stability & Innovation
- Powers 90% of global trade; clean energy adoption shields it from fossil fuel volatility.
- Drives technological innovation in fuels, engines, and ship design.
- Boosts green finance and new business opportunities.
Equity and Employment
- Employs ~2 million seafarers, mostly from developing countries.
- A just transition ensures reskilling, job protection, and inclusive growth.
Global Policy Alignment
- IMO targets: 40% carbon intensity cut by 2030, net-zero by ~2050.
- Expected global carbon pricing will favour green fuel adoption.
Sectoral Accountability
- Ensures shipping doesn’t lag behind sectors like power and transport in emissions cuts.
- Delays may lead to stricter global regulations and economic penalties.
Supports Sustainable Development Goals (SDGs)
- Green shipping promotes SDG 13 (Climate Action) by cutting emissions, SDG 9 through cleaner technologies, and SDG 14 by reducing marine pollution.
Challenges in Decarbonisation of Global Shipping
High costs and financial barriers
- Green fuels (ammonia, e-methanol) are expensive.
- New ships and retrofits require heavy upfront investments.
- Limited access to low-cost capital increases financing challenges.
Fuel availability and infrastructure gaps
- Insufficient global production of green fuels.
- Many ports lack bunkering infrastructure for alternative fuels.
Technological uncertainty
- No universally accepted green fuel solution yet.
- Uncertainty deters large-scale investment.
Regulatory and political hurdles
- IMO framework (e.g., MEPC-83) not yet adopted.
- Opposition from oil-exporting countries resisting green transition.
- Disagreements on emissions levies among countries.
- Erosion of CBDR principle causes equity concerns.
Industry fragmentation and slow adoption
- Shipping industry is conservative and fragmented.
- Slow uptake of new technologies and operational practices.
Limited R&D and innovation scale
- Insufficient global investment in zero-carbon tech development.
Equity and fairness issues
- Developing countries face disproportionate costs.
- Lack of adequate support for just transition and capacity building.
Way Forward for Decarbonising Global Shipping
Accelerate green fuel production and infrastructure
- Scale up manufacturing of green hydrogen, ammonia, and methanol.
- Develop global bunkering infrastructure at major ports.
Strengthen global regulatory frameworks
- Finalize and implement IMO’s Net Zero Framework and MARPOL amendments.
- Ensure fair, transparent, and enforceable carbon pricing mechanisms.
Increase financial support and incentives
- Provide subsidies, grants, and low-interest loans for green shipbuilding and retrofits.
- Encourage investment through sovereign guarantees and international climate finance.
Boost research, development, and innovation
- Fund R&D for advanced zero-emission ship technologies and fuels.
- Promote pilot projects and knowledge sharing across stakeholders.
Promote equity and just transition
- Support developing countries with technology transfer, capacity building, and finance.
- Uphold CBDR principles ensuring differentiated responsibilities.
Industry collaboration and culture change
- Foster partnerships among shipowners, manufacturers, and governments.
- Encourage industry-wide adoption of sustainable practices and transparency.
UPSC Relevance
Global Shipping & Decarbonisation
- GS Paper 3 – Environment & Climate Change: Addresses climate mitigation in hard-to-abate sectors like shipping, aligned with SDG 13 and Paris Agreement goals.
- GS Paper 2 – International Governance: Involves global cooperation
Practice Mains Question:
Q. The global shipping sector is a major emitter of greenhouse gases but has lagged behind in decarbonisation. Discuss the key challenges in decarbonising global shipping and examine India’s potential role in this green transition.
