Key Terms & Concepts — UPSC Mains
Emissions Intensity
"A measure of greenhouse gas emissions per unit of GDP, allowing emissions to rise in absolute terms while declining relative to economic output"
Emissions intensity is a metric that measures the amount of greenhouse gas (GHG) emissions produced per unit of Gross Domestic Product (GDP). It is expressed as tonnes of CO2 equivalent per unit of GDP. Unlike absolute emissions (total tonnes of CO2 emitted), emissions intensity allows a growing economy to increase total emissions while still showing improvement if GDP grows faster than emissions. India's NDC targets are framed as intensity-based — NDC 3.0 commits to a 47% reduction in emissions intensity from 2005 levels by 2035. India achieved a 36% reduction by 2020. Developing countries prefer intensity targets because they accommodate economic growth, while some climate groups argue that only absolute emission caps can meaningfully limit global warming.
This is a critical environmental concept for UPSC. Understanding the difference between emissions intensity (relative) and absolute emissions (total) is essential for answering questions on India's NDC, Paris Agreement commitments, and the CBDR-RC debate. India's per-capita emissions (~2.4 tonnes) and intensity-based targets are frequently contrasted with developed nations' absolute reduction commitments.
- 1 Measured as tonnes of CO2 equivalent per unit of GDP
- 2 India's NDC 3.0 target is 47% emissions intensity reduction from 2005 levels by 2035
- 3 India achieved 36% reduction by 2020 — surpassing the original 33-35% NDC 1.0 target
- 4 Intensity-based targets allow total emissions to rise if GDP grows faster than emissions
- 5 Climate Vulnerable Forum has urged India to adopt absolute emission caps alongside intensity targets
- 6 Climate Action Tracker rates India's overall targets as 'Highly Insufficient' partly due to reliance on intensity targets
- 7 Developed nations like the US and EU use absolute reduction targets from a baseline year
India's NDC 3.0 commits to a 47% emissions intensity reduction by 2035, meaning if GDP triples from 2005 levels while emissions only double, the intensity target is met even though absolute emissions have risen.