Human Contribution to Global Warming Highest Ever in 2025

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Relevance: GS Paper III (Environment, Climate Change) & GS Paper II (International Relations)

Source: IGCC Report, Earth System Science Data, 2026

1 · What Happened

A new yearly study called the “Indicators of Global Climate Change (IGCC)” reports that the human contribution to global warming has reached its highest level ever recorded. It was prepared by an independent group of scientists (many of whom also work with the IPCC) and released during the UN climate talks in Bonn, Germany.
The report confirms that 2025 was the third warmest year on record, just behind 2024 and 2023. It comes at a difficult moment for global climate cooperation, as the United States has withdrawn from the 2015 Paris Agreement.

2 · The Key Numbers to Remember

+1.39°C

Total warming in 2025 above pre-industrial (1850–1900) levels

+1.37°C

The human-caused part alone — an all-time high

56.8 bn t

Greenhouse gases released in a year (CO₂-equivalent) — a global peak

“Pre-industrial” means the period before heavy use of coal and oil (1850–1900), used as the baseline to measure how much we have warmed.

The “Carbon Budget” — the idea you must understand. Think of it as the total amount of greenhouse gases the world can still release and yet have a fair (50%) chance of staying within the safe 1.5°C warming limit. From January 2026, only about 130 billion tonnes are left. But we release about 57 billion tonnes every year — so at this pace, this budget will be used up in under three years.

3 · oncepts Made Simple — La Niña and El Niño

The Pacific Ocean has two natural moods that affect world temperatures. La Niña is the cooling phase (the ocean’s surface near the eastern Pacific turns cooler). El Niño is the opposite — the warming phase.

La Niña — Cooling Phase		El Niño — Warming Phase
2025 happened during La Niña, which normally cools the planet a little.		A strong El Niño is now developing, expected to push temperatures up further into next year.

The worrying signal: Even though 2025 was a cooling La Niña year, human-made warming still hit a record high. This shows that our greenhouse gases are now overpowering nature’s own cooling cycles. The World Meteorological Organisation (WMO) says there is a 91% chance that at least one year between 2026 and 2030 will cross the 1.5°C line.

4 · The Proposed Global Fix — “35% by 2035”

At Bonn Climate Change Conference, negotiators want clean electricity to power at least 35% of the world by 2035, up from 20% today. To hit this target, cars, homes, and factories must switch from fossil fuels to clean electric power.

5 · India’s Climate Promises — The “Panchamrit”

At the global stage, India made five key pledges (INDCs), together called “Panchamrit” (five nectars). The headline ones to remember:

Build clean energy: Install 500 gigawatts of clean power capacity by 2030.
Use green power: Get half of all its electricity from renewable sources by 2030.
Lower pollution: Prevent 1 billion tons of greenhouse gases from entering the air by 2030.
Cleaner economy: Cut the amount of pollution produced per unit of economic growth by 45% by 2030 (compared to 2005).
Net Zero emissions: Stop adding any extra greenhouse gases to the atmosphere by 2070.

These are backed by schemes and bodies worth noting:

the National Action Plan on Climate Change (NAPCC) with its 8 missions (including the National Solar Mission),
the new Carbon Credit Trading Scheme (CCTS),
and solar schemes like PM-KUSUM (solar pumps for farmers) and PM-Suryaghar (rooftop solar for homes).

On the legal side, the National Green Tribunal (NGT) handles environment cases quickly, and the Bureau of Energy Efficiency (BEE) drives energy saving.

UPSC Value Box

IGCC Report	“Indicators of Global Climate Change” — yearly study in Earth System Science Data; tracks human-caused warming.
Anthropogenic	“Human-caused.” In 2025 the human share of warming was +1.37°C — a record.
Carbon Budget	Total gases we can still emit to stay near 1.5°C. Only ~130 bn tonnes left (from Jan 2026).
La Niña / El Niño	Pacific Ocean cooling phase / warming phase — they temporarily lower or raise global temperatures.
Paris Agreement (2015)	Global pact to limit warming well below 2°C, ideally 1.5°C. The US has now withdrawn.
Panchamrit	India’s five climate pledges — incl. 500 GW clean energy by 2030 and Net-Zero by 2070.
NAPCC	National Action Plan on Climate Change — 8 missions, including the National Solar Mission.
CCTS	Carbon Credit Trading Scheme — India’s own carbon market to reward emission cuts.
PM-KUSUM / PM-Suryaghar	Solar schemes — solar pumps for farmers / rooftop solar for homes.
NGT	National Green Tribunal (NGT Act, 2010) — fast-tracks environmental cases.
BEE	Bureau of Energy Efficiency (Energy Conservation Act, 2001) — promotes energy saving.

MCQ Practice Question

Q. With reference to climate science and the recent IGCC report, consider the following statements:

The “carbon budget” refers to the total amount of greenhouse gases the world can still emit while retaining a reasonable chance of staying within the 1.5°C limit.
La Niña is a phase that generally raises global surface temperatures, while El Niño generally cools them.
Under its Panchamrit pledges, India has committed to achieving Net-Zero emissions by 2070.

Which of the statements given above is/are correct?
(a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Answer: (b) 1 and 3 only

Statement 1 — Correct: The carbon budget is the remaining quantity of emissions allowed to stay near the 1.5°C limit.
Statement 2 — Incorrect (the trap): The two have been swapped. La Niña cools and El Niño warms global temperatures — not the other way around.
Statement 3 — Correct: India’s Panchamrit pledges include reaching Net-Zero by 2070.

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