China’s emissions drop amid US‑Israeli war on Iran fuels hopes of a decarbonisation turning point

What happened

Following the outbreak of the US‑Israeli war on Iran, China’s CO2 emissions fell by 1%, according to an analysis of second‑quarter energy data published by the country’s National Bureau of Statistics and reviewed for Carbon Brief by the Centre for Research on Energy and Clean Air. The analysis links the drop to a sharp reduction in oil consumption and to a steady rise in journeys made with electric vehicles and public transport.

The review found oil imports into China fell by 32% in the reported period — a reduction equivalent to roughly one million barrels a day. It also indicates about two‑thirds of that fall came from drawing down strategic oil stockpiles rather than from increased shipments, with the remaining one‑third attributable to lower demand.

Overall oil use in China fell by 9%, and oil use in the transport sector fell by 16%. Analysts note this is the first time China’s overall emissions have declined driven by reduced oil use rather than a fall in coal consumption, marking a distinct pattern compared with earlier emission decreases.

At the same time, coal‑fired generation rose during the quarter. The analysts attribute this to shifting economic incentives and delays in adapting the grid, which led to substantial curtailment of wind and solar output during the period.

Why it is happening

The reduction in oil consumption occurred against the backdrop of disruption in supplies via the Strait of Hormuz and related price shocks: global oil prices surged by about 60% in the weeks and months after the first US airstrikes in late February. For the world’s largest oil importer, these market and strategic pressures created incentives to reduce petro‑dependence.

China’s move away from oil has been under way before the crisis. The country is by far the largest global manufacturer, user and exporter of batteries, electric vehicles, wind turbines and solar panels, and electrification of transport had been accelerating prior to the supply shock. The increase in journeys by electric cars, buses, trains and trucks helped sustain overall transport activity despite lower oil availability.

Analysts also point to a strategic logic: the geopolitical risks associated with oil‑import dependence are difficult to manage directly, so reducing exposure through electrification is seen as an effective policy response. Lauri Myllyvirta of the Centre for Research on Energy and Clean Air said electrification is the ‘‘winning strategy’’ to insure against such shocks.

How it will affect

Analysts predict a substantial portion of the reduced oil demand will not return even if global crude prices fall. That suggests a potential long‑term contraction in Chinese oil demand, with implications for global fuel markets and investment decisions in the oil sector.

The event also strengthens the case for deeper decarbonisation in China’s economic and security planning: by reducing dependence on imported oil, the country can lower its vulnerability to geopolitical disruptions. Ember’s senior analyst Dr Muyi Yang said a fossil fuel peak is emerging at provincial and sectoral levels and that the Iran crisis reinforces the case for a deeper shift away from fossil fuels.

Nevertheless, the short‑term rise in coal generation highlights that the energy transition remains incomplete, with grid constraints and economic incentives still driving some increased use of fossil fuels even as transport electrification advances.

What next

Further, more detailed assessments are expected. Ember will publish a separate overview of China’s energy trends in the coming week, and the Centre for Research on Energy and Clean Air will continue to analyse the crisis’s effects on China’s energy balance. Subsequent official statistical releases and future quarterly data will be needed to clarify how long the effects persist.

Open questions remain. While the analysis identifies that around two‑thirds of the import decline came from drawing down strategic reserves, the precise balance between temporary effects (such as strategic stock releases) and permanent demand shifts requires additional data and monitoring. The extent to which increased electrification will be supported by grid upgrades and renewables integration will also determine whether the observed decline in oil‑related emissions is sustained.