Tamil Nadu’s Green Ambition vs. Science Funding Reality, Why Basic Research Matters for a $1 Trillion Economy
As the State Pivots to Clean Energy and Climate Missions, Its Investment in Fundamental Research Remains Modest—A Gap That Could Undermine Long-Term Innovation
As Tamil Nadu approaches its Assembly elections, its ambition to become a $1 trillion economy by 2030 and its position as one of India’s leading industrial and knowledge hubs means it’s worth examining how the State has invested in science and environmental issues in the last five years. The picture that emerges is one of remarkable ambition in climate action, but persistent underinvestment in the basic science that must underpin long-term technological innovation.
Tamil Nadu has positioned itself as a leader in green technology and climate resilience. It has launched ambitious missions, allocated substantial funds to renewable energy, and set targets that align with national net-zero goals. Yet beneath these headline figures lies a quieter but equally important story: the State’s investment in fundamental research remains modest, and its overall R&D expenditure lags behind other major States and global benchmarks. If Tamil Nadu is to truly become a knowledge economy, this gap must be addressed.
The Climate Action Framework
First, the State’s strategy for the environment has been to integrate climate action across sectors rather than increase a core allocation for the environment and climate change department. Within this framework, it has launched a series of dedicated environmental missions since 2021.
In the 2021-22 fiscal, the State allocated ₹500 crore to establish the Tamil Nadu Climate Change Mission—one of the first of its kind among States—and another ₹150 crore for the Wetlands Mission to restore 100 ecologically sensitive water bodies. The following year, the State established the Tamil Nadu Green Climate Fund with a ₹1,000 crore corpus to finance renewable energy, electric mobility, pollution-control technologies, forest conservation, and circular-economy projects, among other climate-related technologies.
By 2023-24, it had expanded its conservation efforts by dedicating ₹10 crore to Project Nilgiri Tahr and scaling up the Green Tamil Nadu Mission to increase forest cover. The 2024-25 Budget expanded the Sustainably Harvesting Ocean Resources (SHORE) scheme to strengthen the blue economy, and provided subsidies for electric vehicles.
Spending surged in 2025-26 as the government allocated ₹21,178 crore to the energy department, which includes investments in renewable generation, pumped-storage hydro projects, battery energy storage systems, and other infrastructure projects, and ₹100 crore to build new basic science research centres in Chennai and Coimbatore.
These are impressive figures. They demonstrate a genuine commitment to environmental sustainability and clean energy transition. But they also reveal a striking imbalance.
The Funding Gap for Basic Science
Although revenue spending on Science and Technology has risen in recent years, it still represents only a small share of the State’s broader fiscal priorities. It is important to note that according to the National S&T Management Information System (NSTMIS), Tamil Nadu had spent more than ₹600 crore a year on overall R&D until 2020-21. The difference arises because the NSTMIS assesses R&D expenditure across departments rather than going by the expenses under the S&T head.
Even this figure has two important dimensions. For Tamil Nadu, this expense is spread across agriculture (crop research, pest control, etc.), veterinary services (livestock and aquaculture research), public health (clinical research at State medical colleges), and other applied sectors. The first dimension is that applied research does not produce the underlying intellectual property that drives long-term innovation. The second dimension is that in the same period when Tamil Nadu spent just over ₹600 crore a year on R&D, Gujarat spent ₹922 crore and Uttar Pradesh more than ₹1,000 crore.
Chart 1 illustrates the expenditure on research and development by select State governments. In 2018-19, Uttar Pradesh led with ₹974.9 crore, followed by Gujarat at ₹876.3 crore, Punjab at ₹625.7 crore, Maharashtra at ₹603.7 crore, Tamil Nadu at ₹513.8 crore, and Andhra Pradesh at ₹502.4 crore. By 2020-21, the rankings had shifted: Uttar Pradesh at ₹922.6 crore, Gujarat at ₹697 crore, Maharashtra at ₹663.4 crore, Tamil Nadu at ₹609.7 crore, and Andhra Pradesh at ₹501.5 crore.
Tamil Nadu’s R&D expenditure, while growing, consistently lags behind Uttar Pradesh and Gujarat. This is significant because these States are not just competitors in industrial output but also in attracting talent, investment, and research institutions.
The Global Benchmark
A global comparison is possible as well. When South Korea’s Gross Domestic Product per capita was what Tamil Nadu’s is today, it was already allocating 1.2 per cent of its GDP to R&D. However, Tamil Nadu’s total R&D expenditure is under 0.5 per cent of its Gross State Domestic Product, meaning that the State is currently spending less than half of what is required—by the South Korean yardstick—to foster a world-class innovation ecosystem.
South Korea’s trajectory offers a useful lesson. In the 1970s and 1980s, as it transformed from a low-income to a high-income economy, it invested heavily in basic research. It built universities, funded laboratories, and supported scientists. The result was a domestic innovation capacity that allowed it to generate its own technologies rather than relying on imports. Today, South Korea is a leader in semiconductors, displays, and advanced manufacturing.
Tamil Nadu, with its strong industrial base and human capital, has the potential to follow a similar path. But it requires sustained investment in the science that underpins technology.
The Modest Allocation for Science and Technology
The State’s dedicated budgetary allocation for Science and Technology in particular has been much lower. In the decade or so leading up to 2021-22, Tamil Nadu had an annual revenue expenditure averaging around ₹10 crore, primarily for running the Tamil Nadu State Council for Science and Technology, the Science City in Chennai, the Tamil Nadu Science and Technology Centre, and for student projects and popularising science.
But as it pivoted to being a technology-driven economy and got going on its ‘net zero’ commitment, the figures began to climb. By the 2025-26 fiscal, the allocation reached ₹67.5 crore and in 2026-27, an estimated ₹81 crore. While the increase between pre-2021 and 2021-27 is eightfold in nominal terms, it is dwarfed by the allocations for climate-related missions. The State set aside more than ₹21,000 crore for the energy sector in 2025-26 alone.
Chart 2 illustrates the budget allocated by the State to the Science and Technology Centre and the Council for Science and Technology. The growth is visible, but the scale remains modest compared to other States and to the State’s own climate spending.
The Basic Science Gap
Until it announced the ₹100 crore package in the 2025-26 Budget for the new basic science research centres in Chennai and Coimbatore, State funding for fundamental research was modest—most of it in the form of small grant programmes (₹10,000 to ₹1,00,000) such as those administered by the Tamil Nadu State Council for Science and Technology. Major research institutions in the State, such as the Indian Institute of Technology Madras and the Institute of Mathematical Sciences, are mostly funded by the Union government.
This reliance on central funding has consequences. It means that research priorities are set at the national level, not tailored to the State’s specific needs. It means that the State has less ability to attract and retain top researchers. It means that the pipeline from basic science to applied technology is weaker than it could be.
As a result, the State currently lacks the mature R&D required to develop homegrown technologies. Tamil Nadu’s current expenditure is rising, and there is a growing need for human-facilitating hubs to compete with States like Gujarat and Uttar Pradesh.
The Path Forward
What should Tamil Nadu do? Several steps are worth considering.
First, increase the overall R&D expenditure to at least 1 per cent of GSDP, aligning with the South Korean benchmark. This would require a significant but achievable increase in funding.
Second, allocate a larger share of R&D funding to basic science. Applied research is important, but it builds on fundamental knowledge that must be generated elsewhere. Without a strong basic science base, applied research will eventually run out of ideas.
Third, create mechanisms to support research institutions in the State. This could include matching grants for central institutions, block grants for State universities, and competitive funding for research projects.
Fourth, foster partnerships between industry and academia. Many of the technologies needed for the green transition—better batteries, more efficient solar cells, new materials—require collaboration between researchers and industry. The State can facilitate these partnerships.
Fifth, invest in human capital. Research requires trained researchers. This means funding graduate students, postdoctoral fellows, and early-career scientists. It means creating career pathways that keep talent in the State.
Conclusion: A Missed Opportunity?
Tamil Nadu’s ambition to become a $1 trillion economy by 2030 is laudable. Its leadership in climate action is commendable. But the State’s investment in basic science lags behind both its ambitions and its peers.
This is not a criticism of the current government but a recognition of a gap that, if unaddressed, could undermine long-term growth. The technologies that will drive the next generation of economic development—in green energy, in advanced manufacturing, in biotechnology—will be based on research done today. States that invest in that research will reap the rewards. States that do not will find themselves dependent on others for the technologies they need.
Tamil Nadu has the industrial base, the human capital, and the institutional infrastructure to become a leader in the knowledge economy. What it needs now is the sustained investment in basic science that will turn potential into reality.
Q&A: Unpacking Tamil Nadu’s Science Funding Challenge
Q1: How has Tamil Nadu invested in climate action and green technology in recent years?
A: Tamil Nadu has launched ambitious environmental missions since 2021. Key initiatives include: the Tamil Nadu Climate Change Mission (₹500 crore in 2021-22), the Wetlands Mission (₹150 crore), the Tamil Nadu Green Climate Fund (₹1,000 crore corpus), Project Nilgiri Tahr (₹10 crore), and the SHORE scheme for the blue economy. In 2025-26, the State allocated ₹21,178 crore to the energy department for renewable generation, pumped-storage hydro, and battery storage, plus ₹100 crore for new basic science research centres.
Q2: How does Tamil Nadu’s R&D expenditure compare with other major States?
A: According to NSTMIS data, Tamil Nadu spent around ₹600 crore annually on R&D in 2020-21. However, this lags behind other States: Uttar Pradesh spent over ₹1,000 crore and Gujarat spent ₹922 crore in the same period. Chart 1 shows that in 2018-19, Uttar Pradesh led with ₹974.9 crore, followed by Gujarat (₹876.3 crore), while Tamil Nadu was at ₹513.8 crore. By 2020-21, Tamil Nadu had risen to ₹609.7 crore but still trailed Uttar Pradesh (₹922.6 crore) and Gujarat (₹697 crore).
Q3: What is the global benchmark for R&D investment at Tamil Nadu’s level of development?
A: When South Korea’s GDP per capita was at Tamil Nadu’s current level, it was already allocating 1.2% of its GDP to R&D. Tamil Nadu’s total R&D expenditure is under 0.5% of its Gross State Domestic Product—less than half the South Korean benchmark. This suggests the State is underinvesting relative to what would be needed to foster a world-class innovation ecosystem.
Q4: What is the distinction between applied research and basic science, and why does it matter?
A: Applied research focuses on practical problems and near-term solutions, but it builds on fundamental knowledge generated by basic science. Without strong investment in basic science, applied research eventually runs out of ideas and cannot generate the underlying intellectual property that drives long-term innovation. Tamil Nadu’s R&D spending is spread across agriculture, veterinary services, public health, and other applied sectors, but funding for fundamental research has been modest.
Q5: What steps could Tamil Nadu take to strengthen its science and technology ecosystem?
A: Recommended steps include: increasing overall R&D expenditure to at least 1% of GSDP; allocating a larger share to basic science; creating mechanisms to support research institutions (matching grants, block grants, competitive funding); fostering industry-academia partnerships for green technology development; and investing in human capital through graduate fellowships and career pathways to retain talent in the State. The new ₹100 crore allocation for basic science research centres is a positive step but needs to be scaled significantly.
