Emissions Intensity vs. Absolute Emissions Targets

There are two main ways to set a goal for cutting greenhouse gases. An absolute target caps the total amount of gas a country or industry releases, for example "we will release 10% less CO2 in 2035 than in 2020". An intensity target limits the gas released per unit of output, for example per rupee of GDP or per tonne of steel.

Under an intensity target, total emissions can still go up if the economy or industry grows fast, but each unit of output becomes cleaner.

Why do two kinds of targets exist?

Rich countries have already built their roads, homes and factories. Their economies grow slowly, so they can promise to cut total emissions. Developing countries like India still need to build a lot and lift millions out of poverty, so their total energy use must grow for some years. An intensity target lets them grow while still becoming more efficient and cleaner.

Think of two families: one family has finished building its house and can cut its total spending; the other is still building and cannot cut total spending yet, but can promise to waste less on every brick it buys.

How is emissions intensity calculated?

It is a simple division:

• Emissions intensity of GDP = total greenhouse gas emissions ÷ GDP. It is measured, for example, in grams of CO2 per rupee or per dollar of GDP.
• Sector or product intensity = emissions from a plant or industry ÷ the amount it produces. For steel it is written as tonnes of CO2 per tonne of crude steel (tCO2/tcs).

Simple example: a steel plant makes 100 tonnes of steel and releases 250 tonnes of CO2. Its intensity is 2.5. Next year it makes 200 tonnes and releases 400 tonnes of CO2. Its intensity has fallen to 2.0, a 20% improvement, but its total emissions have gone up from 250 to 400 tonnes.

Where did it come from?

The idea grew out of the global climate talks under the UN Framework Convention on Climate Change (UNFCCC, 1992):

• Under the Kyoto Protocol (1997), only developed countries took binding absolute cuts. Developing countries had no targets, in line with the principle of Common but Differentiated Responsibilities (CBDR).
• Under the Paris Agreement (2015), every country sets its own goal, called a Nationally Determined Contribution (NDC). Countries are free to choose the type of target. Most developed countries chose absolute cuts. India and, until recently, China chose intensity targets.

India's targets

• First NDC (2015): reduce the emissions intensity of GDP by 33–35% by 2030 from 2005 levels.
• Updated NDC (August 2022): raised this to 45% by 2030 from 2005 levels, with about 50% of installed electric power capacity from non-fossil sources by 2030.
• Progress: India's fourth Biennial Update Report (submitted December 2024) said India had already reduced its emissions intensity of GDP by 36% between 2005 and 2020.
• NDC for 2031–2035 (approved by the Cabinet in March 2026): cut emissions intensity of GDP by 47% by 2035 from 2005 levels; about 60% of installed electric power capacity from non-fossil sources; and an additional carbon sink of 3.5 to 4 billion tonnes of CO2-equivalent through forest and tree cover.
• Net zero by 2070: announced at COP26 in Glasgow (November 2021) as part of the "Panchamrit" (five nectar elements) pledges.

Intensity targets at the industry level

India also uses intensity targets inside the country under the Carbon Credit Trading Scheme (CCTS), set up under the Energy Conservation Act, 2001 (as amended in 2022). The Greenhouse Gases Emission Intensity Target Rules give each covered plant a target for emissions per unit of product, using 2023-24 as the baseline year, with targets for 2025-26 and 2026-27.

Plants that do better than their target earn carbon credit certificates they can sell; plants that fall short must buy them. The first sectors notified were aluminium, cement, chlor-alkali, and pulp and paper. Steel's sector-level targets under the draft policy follow the same intensity logic.

China as a comparison

China's earlier NDC promised to cut its carbon intensity by over 65% by 2030 from 2005 levels and to peak emissions before 2030. In November 2025, China submitted its first absolute economy-wide target: cutting net greenhouse gas emissions by 7–10% from peak levels by 2035. This shows a common path: countries move from intensity to absolute targets as their economies mature.

Commonly confused concepts

• Intensity reduction vs absolute reduction: A 45% cut in intensity does not mean 45% fewer emissions. Total emissions can still rise if GDP grows faster than intensity falls.
• Emissions intensity vs energy intensity: Emissions intensity is CO2 per unit of GDP. Energy intensity is energy used per unit of GDP. A country can lower emissions intensity without using less energy, simply by switching from coal to solar.
• Net zero vs zero emissions: Net zero means any remaining emissions are balanced by removing the same amount from the air (through forests or technology). It does not mean no emissions at all.
• Per capita emissions vs total emissions: India is the world's third-largest emitter in total, but its emissions per person are well below the world average. India uses this fact to argue for fairness in climate talks.
• Crude steel vs finished steel: Steel intensity numbers can be given per tonne of crude steel (the first solid steel made) or per tonne of finished steel (after rolling and shaping). The two are not directly comparable. India's green steel taxonomy uses finished steel.

Issues, criticism and the way forward

• Critics' view: Intensity targets can allow total emissions to keep rising for decades. Some analysts argue that India's intensity targets are easy to meet because GDP growth alone pushes intensity down.
• India's view: As a developing country with low per capita emissions and a small share of historical emissions, India says it has the right to grow, and that intensity targets balance development with climate action, in line with CBDR and equity.
• Measurement problems: Intensity depends on how output and emissions are measured. Reliable monitoring, reporting and verification (MRV) is essential.
• Way forward: Experts suggest tightening intensity targets over time, adding sector-specific targets for heavy industry (steel, cement, aluminium), building a strong carbon market, and setting a clear date for India's emissions to peak so that the path to net zero by 2070 is credible.

Concepts to Know

• GDP (Gross Domestic Product): The total value of all goods and services produced in a country in a year.
• CO2-equivalent (CO2e): A common unit that converts different greenhouse gases (like methane) into the amount of CO2 that would cause the same warming, so they can be added together.
• Nationally Determined Contribution (NDC): A country's own climate action plan under the Paris Agreement, updated every five years.
• Carbon sink: Anything that absorbs more CO2 from the air than it releases, such as forests, soil and oceans.
• Carbon credit certificate: A tradeable certificate showing that a plant cut its emissions more than required. One certificate usually equals one tonne of CO2-equivalent.
• Common but Differentiated Responsibilities (CBDR): The principle that all countries must fight climate change, but rich countries that polluted more in the past should do more.