What Happened
- India's carbon dioxide emissions grew by approximately 0.7% in 2025 — the slowest annual increase in more than two decades, excluding the anomalous drop during COVID-19 in 2020.
- This represents a sharp deceleration from the 4–11% growth rates seen in the preceding four years (2021–2024).
- The power sector drove the slowdown: power-sector CO₂ emissions fell by 1% year-on-year in the first half of 2025 — only the second such drop in nearly half a century.
- Renewable energy additions reached a record 25.1 GW in 2024 (up 69% year-on-year), and in the first half of 2025, solar output grew by 17 TWh, wind by 9 TWh, hydro by 9 TWh, and nuclear by 3 TWh — together more than offsetting a 29 TWh fall in fossil power generation.
- The steel and cement sectors were the only industries where emissions continued to grow in the first half of 2025.
Static Topic Bridges
India's Emissions Profile and Sector-wise Breakdown
India is the world's third-largest emitter of CO₂ in absolute terms, after China and the United States. However, India's per-capita emissions remain far below the global average, which is central to its argument under the CBDR-RC principle in climate negotiations. India's emissions arise primarily from the energy sector (electricity and heat generation), followed by industry (steel, cement, chemicals), transport, and agriculture. The power sector alone accounts for roughly 50% of India's energy-related CO₂ emissions, making the clean energy transition in the power sector the single most impactful lever for emissions reduction. Coal continues to dominate India's power generation mix, but its share is declining as solar and wind capacity expands rapidly.
- India: 3rd largest CO₂ emitter globally (after China and USA)
- India's per-capita CO₂ emissions: among the lowest for major economies (~2 tonnes/person/year)
- Power sector share of India's energy-related CO₂: ~50%
- Steel and cement: still-growing emission sources; classified as hard-to-abate sectors
- India's total installed power capacity (early 2026): ~500+ GW
- Non-fossil share of installed capacity (Feb 2026): 52.57%
- Power sector CO₂ drop in H1 2025: 1% year-on-year — only second time in ~50 years
Connection to this news: The 2025 emissions slowdown is structurally significant because the power sector (responsible for 60% of the drop in emissions growth rate) is shifting faster than expected — validating India's NDC targets and showing that capacity additions are beginning to displace fossil generation.
Renewable Energy Transition and the Capacity-Generation Gap
India's rapid renewable energy capacity addition — now exceeding 50% of total installed capacity — has not yet translated proportionally into generation, due to lower capacity utilization factors (CUF) for solar and wind compared to thermal plants. Solar CUF is typically 18–22%, wind CUF is 25–35%, while coal plants run at 50–65%. This structural gap means that while capacity milestones are important signals, actual emission displacement depends on how much fossil generation is crowded out. In 2024–25, renewable sources generated about 22.36% of total electricity despite forming over 50% of installed capacity. The 2025 data showing a fall in fossil power generation — even as total power generation grew — signals a genuine inflection point in the energy transition.
- Renewable capacity additions in 2024: 25.1 GW (record; up 69% from previous record)
- Solar CUF: ~18–22%; Wind CUF: ~25–35%; Coal CUF: ~50–65%
- Renewable generation in 2024–25: 22.36% of total electricity
- H1 2025: Total power generation +9 TWh, but fossil generation −29 TWh
- Solar generation growth H1 2025: +17 TWh
- Wind generation growth H1 2025: +9 TWh
- Hydro and nuclear growth H1 2025: +9 TWh and +3 TWh respectively
Connection to this news: The 2025 data showing fossil power generation falling even as total power demand grew is the clearest evidence yet that India's renewable additions are beginning to displace coal — the critical transition from "adding renewables alongside coal" to "replacing coal with renewables."
Hard-to-Abate Sectors: Steel and Cement
While India's power sector is decarbonizing, steel and cement remain high-emission industries with few near-term low-carbon alternatives. Steel production primarily uses the blast furnace-basic oxygen furnace (BF-BOF) route in India, which is coal-dependent. Cement production is similarly carbon-intensive due to the calcination of limestone (releasing CO₂ chemically, not just from fuel combustion). India is the world's second-largest cement producer and the second-largest steel producer. Decarbonizing these sectors requires green hydrogen-based steelmaking, carbon capture, use and storage (CCUS), or clinker substitution in cement — all of which are costly and not yet at commercial scale in India. The continued emissions growth in these sectors in 2025 underscores the challenge of economy-wide decarbonization.
- India: 2nd largest cement producer and 2nd largest steel producer globally
- Steel: BF-BOF route is coal-intensive; green hydrogen-based DRI is the low-carbon alternative
- Cement: ~60% of emissions from limestone calcination (process emissions, not fuel)
- CCUS: Carbon Capture, Utilisation and Storage — not yet commercially deployed in India
- India's National Green Hydrogen Mission (2023): Targets 5 million tonnes green H₂/year by 2030
- Hard-to-abate sectors: Steel, cement, chemicals, aviation, shipping
Connection to this news: The 2025 analysis reveals a bifurcated emissions trajectory — the power sector is decarbonizing rapidly, but industrial emissions from steel and cement continue to grow, highlighting where India's next phase of climate policy must focus.
National Ambient Air Quality Standards (NAAQS) and Pollution Regulation
India's air quality is regulated under the Air (Prevention and Control of Pollution) Act, 1981, and the Environment (Protection) Act, 1986. The Central Pollution Control Board (CPCB) sets National Ambient Air Quality Standards (NAAQS) for pollutants including PM2.5, PM10, NO₂, SO₂, and CO. CO₂, while the primary climate pollutant, is not regulated under NAAQS as it is not a direct health pollutant; rather, it is addressed through climate policy frameworks (NDCs, NAPCC). However, co-pollutants like SO₂, NO₂, and particulate matter from coal combustion are subject to strict standards, creating a co-benefit between emissions reduction and air quality improvement.
- Air (Prevention and Control of Pollution) Act, 1981: Framework for air quality regulation
- Environment (Protection) Act, 1986: Umbrella legislation; grants central government broad powers
- CPCB: National body for setting and enforcing pollution standards
- NAAQS: PM2.5 annual standard = 40 μg/m³ (India); WHO guideline = 5 μg/m³
- CO₂ not regulated under NAAQS — addressed via climate framework, not pollution law
- Co-benefits: Every tonne of coal avoided reduces both CO₂ and health-damaging air pollutants
Connection to this news: India's emissions slowdown in 2025 yields dual benefits — reduced CO₂ for climate goals and reduced co-pollutants (SO₂, NOₓ, particulates) for public health — making the energy transition a multi-objective policy win.
Key Facts & Data
- India's CO₂ growth rate in 2025: ~0.7% (slowest in over 20 years, excluding COVID)
- Previous growth rates: 4–11% per year in 2021–2024
- Power sector CO₂ change in H1 2025: −1% year-on-year (second drop in ~50 years)
- Power sector contribution to emissions growth slowdown: 60% of the deceleration
- Record clean energy capacity addition: 25.1 GW in 2024 (up 69% year-on-year)
- Fossil power generation in H1 2025: −29 TWh year-on-year despite rising total demand
- Non-fossil installed capacity (Feb 2026): 52.57% of India's total
- India's CO₂ emissions from fossil fuels and cement in H1 2025: slowest since 2001 (ex-COVID)
- Sectors where emissions still grew in H1 2025: Steel and cement
- India's global CO₂ rank: 3rd largest emitter (absolute), but low per-capita