Global Warming 1.5°C Threshold Could Be Crossed by 2030

UNFCCC

Global warming 1.5°C threshold could be exceeded within about four years if current emissions trends continue, according to an international team of climate scientists. Human-induced warming reached 1.37°C above the 1850-1900 average in 2025.

Global warming 1.5°C risk is rising because greenhouse gas concentrations remain at record levels. Human-induced warming is increasing at around 0.27°C per decade, keeping the world on a trajectory toward further temperature increases.

Global warming 1.5°C also carries direct industrial implications. More frequent heat, drought, flooding and extreme weather can disrupt mining, energy systems, transportation networks and metals production.

The remaining carbon budget consistent with limiting warming to 1.5°C is estimated at around 130bn t of CO2 from the start of 2026. At current emission rates, that budget could be exhausted in roughly three years.

Carbon Budget Shrinks as Emissions Remain Near Records

Global greenhouse gas emissions reached a record 56.8bn t of CO2 equivalent in 2024, with fossil fuel consumption remaining the largest contributor.

The rate of emissions growth has started to slow, suggesting that renewable energy, electrification and climate policies are beginning to affect the trajectory.

However, slower emissions growth is not the same as absolute emissions reductions. Global CO2 output must fall substantially if the remaining carbon budget is to last longer.

That creates additional pressure on governments to accelerate investment in renewable power, grids, storage, nuclear energy and energy efficiency.

For metals markets, this implies stronger structural demand for copper, aluminium, electrical steel, lithium and other materials required for electrification.

At the same time, heavy industries such as steel, aluminium, cement and chemicals will face greater pressure to lower emissions from existing production.

This increases the strategic value of low-carbon electricity, recycling and technologies that reduce the emissions intensity of industrial production.

Strong El Nino Could Add Near-Term Climate Pressure

The emergence of El Nino conditions could temporarily accelerate global temperatures even further.

Current forecasts suggest the event could become very strong, with some models indicating potentially record intensity. El Nino typically raises global temperatures by releasing additional heat from the tropical Pacific into the atmosphere.

That could push annual temperatures sharply higher and potentially make the coming year the hottest recorded since modern measurements began.

The hottest year so far remains 2024, while 2023-25 were the three warmest years on record. Their combined average was around 1.48°C above pre-industrial levels.

Temporary annual breaches do not necessarily mean the Paris Agreement's long-term 1.5°C target has formally been exceeded. However, repeated breaches would indicate that the underlying warming trend is moving increasingly close to that level.

For industry, the implications extend beyond emissions regulation. Extreme temperatures and weather events can reduce hydropower availability, disrupt mining operations, strain electricity grids and increase cooling demand.

Climate risk is therefore becoming an operational and supply-chain issue as much as an environmental one.

The Metalnomist Commentary

The shrinking carbon budget increases pressure for faster electrification, but that transition will require enormous quantities of metals. The challenge is that climate policy is simultaneously increasing demand for critical materials while climate disruption makes producing those materials more difficult.