Sustainability is the Lighthouse — But You Need Ships of Finance to Sail

In today’s world of climate urgency, resource insecurity, and widening social inequalities, sustainability has emerged as the lighthouse—a symbol of moral and strategic direction for responsible growth. It reminds us that we must change course amidst the storms of environmental and economic disruption.

But a lighthouse, no matter how bright, cannot move us forward. You still need powerful ships to sail. In the world of sustainability, those ships are made of finance. You need capital—often reengineered—to turn vision into voyage to achieve the mission.

According to the UN’s 2024 SDG Financing Gap Report United Nations SDG Financing Gap Report 2024: developing countries face an annual shortfall of $4.2 trillion to meet the Sustainable Development Goals (SDGs) by 2030. Meanwhile, the IPCC’s AR6 Synthesis Report projects climate finance needs of $3–6 trillion annually by 2030 to keep global warming within the 1.5°C threshold.

Global sovereign wealth funds, multilateral development banks (MDBs), and bilateral donors play a foundational role. They help de-risk early-stage projects, offer concessional terms, and act as financial shock absorbers in emerging markets. But even if their support were doubled, it would still fall far short of what’s needed. These sources operate slowly, often constrained by bureaucracy or geopolitics. My Professor Friend often grumbles that tThey’re like the slow-moving ferries of sustainability—not agile enough for today’s climate storms.

Further they seem to prioritize large-scale interventions, leaving MSMEs and communities underserved and avoid high-risk sectors like climate tech, inclusive circular economy, and regenerative agriculture. Thus, institutional capital needs to step in.

Today, institutional investors—pension funds, insurers, and sovereign wealth funds—manage over $100 trillion in assets globally. Redirecting even 1% of this toward sustainable finance could dramatically close the climate financing gap. But capital markets offer the speed – fast deployment of capital; liquidity – flexible exits and entries as well as the scale – deep pools of funding across borders.

India’s cumulative sustainable debt issuance crossed $55.9 billion by December 2024, with green bonds making up 83% (≈$46.3 billion). The surge reflects strong investor appetite and regulatory support. Visit  Climate Bonds Initiative

Meanwhile, the ESG-focused ETFs are integrating sustainability into mainstream portfolios. Crowdfunding and retail ESG platforms are democratizing climate investing and Fintech ecosystems in India and Southeast Asia are enabling real-time, small-ticket green investments.

“This isn’t charity anymore,” the Professor quips. “It’s a risk-adjusted strategy dressed in a green tie.” It  is no longer philanthropy—it is about future-proofing portfolios and addressing global as well as challenging geopolitical risks.

There are several sustainable finance instruments out there but the sustainability-Linked Loans (SLLs) have always draw my attention as they show a Win-Win deal for lender and borrower. Unlike green loans tied to specific projects, SLLs reward borrowers for hitting sustainability performance targets (SPTs), typically via interest rate reductions. They offer flexibility in use of proceeds, Incentivize internal ESG transformations and align corporate strategy with capital costs. When I told my Professor Friend about my view on SLLs, he chuckled, “Essentially a loan that gets cheaper the better you behave. But Dr Modak, would you recommend to a regulator reducing  pollution charges to those industries who consistently remain within the limits.” I pretended that I did not hear what he said.

India leads with some great examples of SLL. UPL was the first inspiration example. In March–April 2021, UPL launched a $750 million, 5‑year SLL—India’s first syndicated sustainability-linked loan for a corporate—oversubscribed from an initial $500 million, led by MUFG. In December 31, 2021, UPL raised a second $700 million tranche, replacing its acquisition loan. This drew a 35 bp margin reduction, with an additional 5 bp bonus for hitting sustainability targets. UPL’s SLL  set a precedent by being India’s first and largest corporate SLL, attracting a new wave of ESG-conscious investors. There have been examples of Sustainability Linked Bonds (SLBs) too

• • JSW Steel became world’s 1st steel co to raise $1 bn  by issuing Sustainability Linked Bonds (SLBs) in the overseas market hedging on their sustainability performance
  • Adani Electricity Mumbai raised $300 M through SLB that was oversubscribed 9.2 times

Each deal shows how ESG alignment is now a financial advantage, not just a reputational one. So it is not surprising that progressive firms today integrate ESG into capital budgeting, anticipate credit rating impacts from sustainability performance and develop instruments like ESG-tied working capital or transition bonds. Bank like Citi has committed to mobilizing $1 trillion in sustainable finance by 2030 and $1.5 trillion are pledged by Bank of America.

Finance is also evolving in form and function. Examples include

• • Blended finance mixes concessional and commercial capital (e.g., GCF-backed funds)
  • Green fintech offers micro-loans for solar rooftops or drip irrigation
  • Blockchain enables tokenized, traceable impact investing
  • Crowdfunding platforms (e.g., mini-grids in Africa) mobilize capital for grassroots climate solutions

Unfortunately, CFOs and CSO’s don’t sit together

In many organizations, the ESG agenda is either relegated to sustainability teams without financial clout or managed in financial silos with limited understanding of systemic ESG risks and opportunities. This fragmentation leads to suboptimal decisions and missed opportunities. What’s needed is a deliberate convergence—where the CSO and CFO sit together to co-navigate the ESG-finance nexus.

Because ESG is not about ticking boxes—it’s about integrating materiality with material outcomes. And unless the insights of the CSO are translated into investment-grade signals for the CFO, sustainability will remain a lighthouse admired from afar—not a strategy that steers capital allocation.

Consider how many companies conduct their materiality assessments. Rarely are these materiality perspectives connected to business and financial strategy in their nexus. Even worse, CFOs often view ESG as a cost center rather than a risk mitigator or value creator. The result? Poor capital flows to truly impactful ESG initiatives. And worst of all—missed systemic risks.

ESG Nexuses are often overlooked

The world of ESG has rapidly moved beyond checklists and compliance. Today, investors, regulators, customers, and employees demand not only that companies “say” they care about Environment, Social, and Governance issues, but that they actively “show” it through real, measurable actions. Yet for many practitioners, ESG remains fragmented: decarbonization in one team, circular economy in another, human rights isolated in supplier audits. Let me give here five examples to support my argument in appreciating the importance of understanding and responding to the ESG nexus.

1. Decarbonization ↔ Circular Economy ↔ Supply Chain Resilience

• • Reuse and remanufacturing reduce demand for virgin raw materials (lowering Scope 3 emissions).
  • Shorter supply chains (from localized circular loops) improve resilience against climate disruptions as well as pandemics.
  • Circularity improves carbon footprint and supply chain security.

2. Water Stewardship ↔ Climate Change Adaptation ↔ Biodiversity

• • Managing water efficiently protects freshwater ecosystems (biodiversity).
  • Climate-resilient water strategies (e.g., watershed management) reduce climate risks to operations.
  • Protecting natural water systems boosts both climate adaptation and nature positivity.

3. Human Rights ↔ Climate Transition ↔ Just Transition

• • Decarbonization efforts (e.g., closing coal mines, electrification of mobility etc) impact livelihoods; companies must manage workforce transitions fairly, especially when assets get stranded and when the supply chains disrupt
  • Renewable energy supply chains must uphold labor rights (e.g., no forced labor in cobalt mining for batteries).
  • Climate action and social equity must go hand-in-hand.

4. Product Innovation ↔ Customer Trust ↔ ESG Differentiation

• • Products designed with sustainability in mind (low-carbon, circular, socially responsible) strengthen brand loyalty.
  • Meeting ESG expectations from customers becomes a market differentiator, not just compliance.

5. Biodiversity ↔ Decarbonization ↔ Supply Chain Sourcing

• • Nature-based solutions (like forest conservation) are key tools for carbon offsetting.
  • Sustainable sourcing (e.g., certified palm oil, sustainable forestry) protects biodiversity and decarbonizes supply chains.
  • Supply chain decisions drive both climate and nature outcomes.

So, it is clear that in reality, material ESG topics are not isolated. They are all interconnected. And when managed together, their impact is exponential. When nexus is recognized explicitly, needs for sustainable finance are much better articulated and importantly, promises on improving sustainability performance are better delivered for the advantage.

I have just signed up writing of a book titled “The ESG Nexus – From Silos to Synergy in Sustainability” on “why” and “how to” with examples. This book should be available early next year in the market.

Lighthouses Don’t Move Ships

Sustainability gives us purpose. But without action—without finance—we remain dreamers on the shore.

We must build strong, agile, mission-driven ships of finance, crewed by strategists who can sail through uncertainty and into resilient futures.

CSOs bring the foresight; CFOs bring the financial levers. Together, they can co-create ESG pathways recognizing the importance of ESG nexus. Unless the helm (finance) and the compass (sustainability) are connected, we’ll drift—endlessly circling the same debates whether  sustainability is any good business.

My Professor Friend estinguished his cigar and sighed:
“Too many companies admire the lighthouse. Too few build ships.”

Time to change my friends.