Yes, passing 1.5 C of global warming is cause for alarm, but not despair
A United Nations report has confirmed that global average temperature rise will exceed the 1.5°C threshold set by the Paris Agreement, describing the situation as an "overshoot" scenario rather than an outright failure of the climate goal.
Scientists quoted in the assessment stress that crossing 1.5°C was foreseeable given decades of accumulated atmospheric carbon dioxide, comparing continued warming to a "freight train" with immense inertia driven by persistent fossil fuel use.
The assessment frames the moment as cause for urgency rather than resignation, noting that every fractional increase in warming beyond 1.5°C changes the severity of future climate impacts.
The core prescription offered is the phase-out of oil, coal, and natural gas combustion, with carbon dioxide removal technologies characterised as unproven at the scale required and currently too costly to substitute for direct emissions cuts.
The Paris Agreement and the 1.5°C Goal
The Paris Agreement, adopted at COP21 in December 2015, is the primary international treaty governing global climate action after the Kyoto Protocol. Its Article 2 sets a long-term temperature goal: holding the increase in global average temperature to "well below 2°C" above pre-industrial levels, while "pursuing efforts" to limit the increase to 1.5°C.
Key Details
- Adopted 12 December 2015 at COP21, Paris; entered into force 4 November 2016.
- The 1.5°C aspirational limit was pushed into the text by the Alliance of Small Island States (AOSIS) and Least Developed Countries (LDCs), for whom even 2°C of warming poses existential risk (sea-level rise, extreme weather).
- Unlike the Kyoto Protocol's top-down binding targets, the Paris Agreement operates through Nationally Determined Contributions (NDCs) — bottom-up, self-determined pledges reviewed every five years (the "ratchet mechanism").
- India ratified the Paris Agreement on 2 October 2016.
The UN report's overshoot finding relates directly to the Article 2 goal — the world is confirmed to be breaching the more ambitious 1.5°C aspiration, though the legally binding "well below 2°C" language remains the treaty's operative commitment.
IPCC Special Report on 1.5°C (SR1.5) and "Overshoot" Pathways
The IPCC's Special Report on Global Warming of 1.5°C (SR1.5), published in 2018 at the invitation of the Paris Agreement parties, was the first comprehensive assessment showing that the difference between 1.5°C and 2°C of warming is significant for risks to ecosystems, food security, and coastal populations.
Key Details
- SR1.5 (2018) defined "overshoot" pathways as scenarios where warming temporarily exceeds 1.5°C before being brought back down through large-scale carbon dioxide removal later in the century.
- The report found that limiting warming to 1.5°C (versus 2°C) roughly halves the population exposed to water scarcity and coral reef loss risk, among other findings.
- The 2023 Global Stocktake (concluded at COP28, Dubai) found that the world is not on track to meet the Paris Agreement's goals and that limiting warming to 1.5°C with no or limited overshoot requires cutting global emissions 43% by 2030 and 60% by 2035, relative to 2019 levels, reaching net-zero CO2 by 2050.
The UN report's overshoot framing directly echoes SR1.5's "overshoot pathway" concept — the scientific position is that overshoot is manageable only if peak warming is kept as low and as brief as possible through steep near-term emissions cuts.
India's Nationally Determined Contributions (NDCs)
India's climate pledges under the Paris Agreement's NDC framework have been revised twice, reflecting the "ratchet mechanism" of progressively more ambitious targets every five-year cycle.
Key Details
- Updated NDC (approved by Union Cabinet, August 2022) operationalised the "Panchamrit" announced at COP26 (Glasgow, 2021): reduce emissions intensity of GDP by 45% by 2030 (from 2005 levels) and achieve about 50% cumulative installed electric power capacity from non-fossil sources by 2030.
- A further NDC covering 2031-2035 was approved by the Union Cabinet in March 2026, raising the emissions-intensity reduction target to 47% by 2035 and the non-fossil power capacity target to 60% by 2035, alongside a carbon sink target of 3.5-4.0 billion tonnes of CO2 equivalent by 2035 through forest and tree cover.
- India's long-term goal, also announced at COP26, is net-zero emissions by 2070.
- India's emissions intensity had already fallen 36% from 2005 levels by 2020, and non-fossil power capacity reached about 52.6% by February 2026 — ahead of the earlier 2030 target.
India's progressively tightened NDCs are the kind of national-level action the UN report says must accelerate globally if overshoot beyond 1.5°C is to be kept shallow and short-lived rather than deep and prolonged.
- Paris Agreement adopted: 12 December 2015 (COP21); entered into force: 4 November 2016; India ratified 2 October 2016.
- IPCC SR1.5 (Special Report on Global Warming of 1.5°C) published: 2018.
- COP28 Global Stocktake (2023) mitigation requirement: 43% emissions cut by 2030, 60% by 2035 (vs. 2019 levels), net-zero CO2 by 2050.
- India's 2022 NDC targets (2030): 45% emissions-intensity reduction (from 2005), 50% non-fossil power capacity.
- India's 2026 NDC targets (2035): 47% emissions-intensity reduction (from 2005), 60% non-fossil power capacity, net-zero by 2070.
- Worst-case fossil-fuel-reserve-exhaustion scenario cited: temperature rise beyond 8-10°C.