Sustainable development and climate finance for RBI Grade B

Ten years ago climate was an environment topic. For a central bank it is now a question about inflation, growth and the safety of bank balance sheets. Heatwaves push up food prices; floods damage the property that secures loans; a shift away from coal can leave loans to coal-dependent firms unpaid. That is why the RBI joined the Network for Greening the Financial System and why ESI and F&M papers both ask about climate finance. This guide covers the development concepts, the economics, India's commitments and the finance, with the numbers hedged where they change.

Sustainable development: the concept

The Brundtland Report (Our Common Future, 1987) defined sustainable development as development that meets the needs of the present without compromising the ability of future generations to meet their own needs. Three pillars follow: economic, social and environmental.

Two ideas give an answer depth:

• Weak vs strong sustainability: weak sustainability allows natural capital to be replaced by man-made capital as long as total capital does not fall; strong sustainability says some natural capital (a stable climate, biodiversity) has no substitute.
• Environmental Kuznets curve: pollution first rises with income, then falls. The evidence holds for some local pollutants but is weak for carbon dioxide, which is why waiting to "grow out of" emissions is risky.

The global framework

NITI Aayog tracks states on the SDGs through its SDG India Index, first published in 2018.

India's commitments

At COP26 in Glasgow (2021), India announced a goal of net-zero emissions by 2070. Its updated NDC of 2022 included:

1. Reducing the emissions intensity of GDP by 45% by 2030 from the 2005 level.
2. About 50% of cumulative electric power installed capacity from non-fossil sources by 2030.
3. An additional carbon sink of 2.5–3 billion tonnes of CO₂ equivalent through forest and tree cover by 2030.

Domestically, the National Action Plan on Climate Change (2008) set up eight national missions, including solar energy and enhanced energy efficiency.

Worked example: intensity versus absolute targets

An intensity target limits emissions per unit of GDP, not total emissions.

1. Set the 2005 emissions intensity at 100 units per unit of GDP.
2. A 45% cut gives 2030 intensity of 55.
3. Suppose real GDP in 2030 is three times its 2005 level.
4. Emissions in 2030 = 3 × 55 = 165, against 100 in 2005.

Emissions still rise by 65% while the target is met. That is deliberate: developing countries argue under CBDR-RC that they need room to grow. It is also why net zero needs absolute cuts later.

The economics: why markets over-pollute

Emissions are a negative externality: the polluter does not pay the cost that others bear. The atmosphere is also a global commons, so each country has an incentive to free-ride on others' cuts.

The textbook fix is to price carbon:

India uses several: the Perform, Achieve and Trade (PAT) scheme trades energy-saving certificates among energy-intensive industries, and the Carbon Credit Trading Scheme (2023), under the Energy Conservation (Amendment) Act, 2022, builds a domestic carbon market. Taxes on coal and fuel also act as implicit carbon prices.

Climate risk for the economy and banks

For a central bank, climate touches both mandates: price stability (supply shocks become more frequent) and financial stability (correlated losses across banks).

Green finance instruments

• Green bonds: debt whose proceeds are used only for eligible green projects, with reporting on use. Companies, banks and governments issue them.
• Sovereign green bonds: the Government of India published a framework in 2022 and first issued them in early 2023. Proceeds go to eligible public projects such as renewable energy and clean transport.
• Green deposits: the RBI's framework (2023) lets banks and deposit-taking NBFCs accept deposits earmarked for green lending, with disclosure and third-party verification.
• Sustainability-linked loans and bonds: the interest rate is tied to the borrower meeting sustainability targets.
• Blended finance: public or concessional money takes the first loss to attract private investors.

Worked example: the greenium

A greenium is the lower yield investors accept for a green bond.

1. A conventional bond yields 7.40%; a comparable green bond yields 7.35%.
2. Greenium = 0.05 percentage points, or 5 basis points.
3. On ₹1,000 crore of borrowing, annual interest saved = 0.0005 × 1,000 = ₹0.5 crore (₹50 lakh).

Small per rupee, but real over the life of large issues. A greenium only lasts if investors trust the label, which is why verification matters.

What regulators are doing

• The RBI became a member of the Network for Greening the Financial System (NGFS) in 2021.
• It has issued a draft disclosure framework on climate-related financial risks for regulated entities, and has published work on climate stress testing.
• SEBI requires the largest listed companies to publish a Business Responsibility and Sustainability Report (BRSR).
• A national climate finance taxonomy is being developed to define what counts as green.

Model answer outline (15 marks)

Question: Why should a central bank be concerned with climate change? What can the RBI do within its mandate?

1. Introduction: climate as a source of economic shocks and financial risk.
2. Price stability: weather-driven food and energy shocks; more frequent supply shocks.
3. Financial stability: physical and transition risks; stranded assets; correlated losses.
4. Mandate debate: a central bank should manage risks to its goals; industrial policy on emissions belongs to government.
5. Tools: disclosure, climate stress tests, supervisory expectations, green deposits, NGFS work, data.
6. Limits: data gaps, long horizons, risk of cutting credit to agriculture and MSMEs.
7. Conclusion: measure and manage risk while supporting an orderly transition.

Short model answer (10 marks)

Question: Distinguish between physical and transition risks with examples from Indian banking.

Physical risks arise from the climate itself. Acute events such as cyclones and floods destroy crops, stock and property; chronic changes in rainfall and temperature lower farm yields over time. For an Indian bank, a flood in a district can raise defaults on agricultural and MSME loans and reduce the value of collateral at the same moment.

Transition risks arise from the move to a low-carbon economy. Carbon pricing, efficiency rules, cheaper renewable power or changing investor preferences can cut the earnings of carbon-intensive firms. A loan to a coal-based plant may become hard to repay if the plant runs less often than planned; the asset becomes stranded.

The two move in opposite directions over time: a slow transition means more physical risk, a fast one more transition risk. Banks need to measure both, through scenario analysis and stress tests, so that capital and lending reflect the risk.

Practice questions

1. Which report gave the standard definition of sustainable development?
   • The Brundtland Report, 1987.
2. How many SDGs are there, and for which year are they set?
   • 17 goals, for 2030.
3. What year has India set for net-zero emissions?
   • 2070.
4. If intensity falls by 45% and GDP doubles, what happens to emissions?
   • They rise by 10%. 2 × 0.55 = 1.10.
5. Which market mechanism fixes quantity and lets price vary?
   • Cap-and-trade.
6. In which year did the RBI join the NGFS?
   • 2021.

What to do next

• Draw the risk table from memory with one Indian example per row.
• Note India's latest NDC targets and the status of climate disclosure rules.
• Rework the intensity example with a GDP multiple of 2.5.
• Read the agriculture guide and the risk management guide.