Global warming is no longer a projection debated in scientific journals — it is a measured, ongoing reality confirmed year after year by the world's leading climate agencies. According to the World Meteorological Organization's State of the Global Climate report, the years 2015 to 2025 rank as the eleven warmest years since instrumental records began 176 years ago. The global average surface temperature in 2025 stood at roughly 1.44°C above the 1850–1900 pre-industrial baseline, placing it among the second or third warmest years ever recorded, trailing only marginally behind 2024 and 2023 — themselves record-breaking years in their own time.
This is not a story about isolated heatwaves. It is a story about a system that is steadily and measurably shifting. Atmospheric concentrations of carbon dioxide, methane and nitrous oxide reached record highs in 2024 and continued climbing through 2025. The ocean, which absorbs roughly ninety percent of the excess heat trapped by greenhouse gases, has been taking in an amount of energy each year equivalent to about eighteen times all of humanity's annual energy consumption. Arctic sea ice extent after the winter freeze hit its lowest point on record, while Antarctic sea ice tracked well below its long-term average through the year.
Why the 1.5°C Number Matters
The Paris Agreement's central goal — limiting long-term warming to well below 2°C, and ideally to 1.5°C, above pre-industrial levels — refers to a sustained, multi-decade average, not any single year. A year that crosses 1.5°C, as several recently have on a temporary basis, does not by itself mean the Agreement has failed. But these repeated near-term spikes are widely read by scientists as an early warning. The WMO's own projections suggest the 20-year average for 2015–2034 is now tracking toward roughly 1.44°C, and there is a growing probability that at least one of the next five years will temporarily exceed 1.5°C outright.
What Is Driving It
The physics is well established. Burning coal, oil and natural gas releases carbon dioxide that accumulates in the atmosphere and traps outgoing heat. Deforestation removes a major carbon sink at the same time as it releases stored carbon. Industrial processes, agriculture and waste management add methane and nitrous oxide, both far more potent than CO₂ over shorter timeframes. What has changed is not the mechanism but the scale — global fossil fuel combustion and land-use change together now push more greenhouse gases into the atmosphere each year than natural sinks can absorb, leaving a growing surplus that accumulates over decades.
The India Context
For India, the consequences are concrete rather than abstract. Warmer baseline temperatures are intensifying pre-monsoon heatwaves across the Indo-Gangetic plain, altering monsoon onset and withdrawal patterns that hundreds of millions of farmers depend on, and increasing the frequency of extreme rainfall events even as some regions face longer dry spells. For industry, this translates into tightening regulatory expectations: stricter emission norms, mandatory Scope 1–3 GHG reporting under frameworks like BRSR, growing pressure from lenders and investors for credible decarbonisation roadmaps, and physical climate risk that now factors directly into site selection, water allocation, and insurance costs.
Where This Leaves Industry and Policy
Global emissions reduction commitments under the Paris Agreement have already bent the long-term warming curve — from a worst-case trajectory of 3.7–4.8°C by 2100 down to roughly 2.4–2.6°C under current pledges. That is real progress, but still far short of the 1.5°C goal. Closing that gap requires faster deployment of renewable energy, deeper industrial efficiency gains, restoration of natural carbon sinks such as forests and wetlands, and — critically — credible, verifiable corporate climate action rather than voluntary pledges alone. For Indian industry, the message from the science is unambiguous: climate risk assessment, carbon accounting, and emissions reduction planning are no longer optional add-ons to compliance — they are becoming central to how regulators, financiers and markets evaluate a business.