Driven by Steel Production, China’s Belt and Road Construction Carries a Heavy Climate Cost

China’s steel industry faces a carbon problem tied to infrastructure

China produces more steel than any other country. It also runs the world’s most carbon-intensive steelmaking process. Those two facts combine to create a climate challenge that reaches far beyond China’s borders, particularly through the Belt and Road initiative.

The numbers tell a stark story. In 2020, China’s iron and steel industry released an estimated 1,644 teragrams of CO2 into the atmosphere. That figure accounts for roughly 17% of China’s total carbon emissions. When you include the electricity these plants consume, steel becomes the country’s largest industrial source of carbon.

This matters because infrastructure projects under the Belt and Road initiative create sustained demand for steel. Meanwhile, China continues to approve new coal-based steelmaking capacity. Consequently, the infrastructure built today could lock in high emissions for decades to come.

Blast furnaces drive 81% of steel sector emissions

China’s steel industry overwhelmingly relies on a production method known as blast furnace–basic oxygen furnace, or BF-BOF. This process burns large quantities of coal to convert iron ore into steel. It is also highly carbon-intensive.

Recent analysis shows that blast furnaces alone account for 81% of total CO2 emissions from China’s steel sector. The reliance on this method is not decreasing. In fact, 99% of new ironmaking capacity approved in recent years has used blast furnaces. Similarly, 70% of new steelmaking capacity has used basic oxygen furnaces.

The scale of China’s steel production amplifies the climate impact. Steel ranks among the most energy-intensive industries globally, responsible for approximately 7% of worldwide greenhouse gas emissions and 11% of global CO2 emissions. Therefore, China’s production choices influence the global carbon budget significantly.

Alternative methods exist. Electric arc furnaces, which melt scrap steel using electricity rather than coal, produce far fewer emissions. However, they require a steady supply of recycled steel and a cleaner electricity grid to deliver meaningful carbon reductions.

National climate commitments conflict with infrastructure expansion

China announced in September 2020 that it would peak carbon emissions by 2030 and reach carbon neutrality by 2060. These commitments set clear climate targets. Nevertheless, the steel industry’s trajectory does not align with these goals.

Initially, China’s steel sector was expected to peak emissions by 2025. That target was later revised to 2030 in final guidelines. This delay reflects the tension between economic growth priorities and decarbonization requirements.

A net-zero roadmap for Chinese steel suggests emissions could fall to approximately 78 million metric tons of CO2 per year by 2050 under an ambitious pathway. This represents a 96% reduction from 2020 levels. However, achieving this outcome requires substantial changes across multiple fronts.

Specifically, the pathway depends on aggressive demand reduction, improved energy efficiency, fuel switching, electrification, grid decarbonization, and large-scale adoption of scrap-based electric arc furnaces. Each of these steps faces technical, economic, or policy barriers.

Belt and Road infrastructure creates long-term emissions risk

The Belt and Road initiative funds roads, railways, ports, and other infrastructure across dozens of countries. These projects require enormous quantities of steel. Consequently, they create sustained demand for Chinese steelmaking capacity.

This demand arrives at a critical moment. China continues to invest in coal-based blast furnace capacity despite climate commitments. Research indicates there are no strong signs of stopping these investments. As a result, new high-emitting plants are being built while the country simultaneously pledges to decarbonize.

This creates a risk of stranded assets. If China must retire coal-based steelmaking plants early to meet its 2060 carbon neutrality target, the infrastructure investments made today could become economically unviable before the end of their expected operational life. Furthermore, premature plant closures impose costs on investors, workers, and local governments.

The infrastructure itself also carries a carbon legacy. Roads, bridges, and buildings constructed with high-carbon steel embed those emissions in structures that will last for generations. Even if China transitions to cleaner steelmaking methods in future decades, the carbon cost of today’s construction cannot be reversed.

Some research suggests the Belt and Road’s climate effects vary by region and policy design. Studies have found reduced carbon intensity in some participating cities through industrial upgrading and agglomeration effects. However, these benefits depend heavily on the types of projects funded and the standards applied to their construction.

Core facts about China’s steel emissions challenge

• China’s iron and steel industry emitted an estimated 1,644 teragrams of CO2 in 2020, representing about 17% of the country’s total carbon emissions.
• Blast furnaces contribute 81% of CO2 emissions from China’s steel sector, yet 99% of recently approved ironmaking capacity uses this coal-intensive method.
• Steel production accounts for roughly 7% of global greenhouse gas emissions and 11% of global CO2 emissions worldwide.
• China committed to peak carbon emissions by 2030 and reach carbon neutrality by 2060, but the steel sector’s peak was delayed from 2025 to 2030.
• A net-zero pathway could reduce steel emissions to 78 million metric tons of CO2 annually by 2050, a 96% cut from 2020 levels, but requires major shifts in production methods and demand.
• Belt and Road infrastructure projects drive ongoing steel demand while China continues approving new coal-based steelmaking capacity, creating stranded asset risks.

Production method choices determine long-term emission paths

The primary challenge facing China’s steel industry is clear. Phasing out carbon-intensive BF-BOF steelmaking is essential to achieving climate targets. Electric arc furnaces offer a cleaner alternative, particularly as China’s electricity grid incorporates more renewable energy.

However, transitioning production methods requires more than building new plants. It demands a reliable supply of scrap steel, which grows as existing steel products reach the end of their useful life. In countries with mature infrastructure, scrap availability supports higher electric arc furnace adoption. China’s infrastructure is comparatively newer, so scrap supply will increase gradually over coming decades.

The timing matters enormously. Investments in coal-based capacity today will operate for 30 to 50 years unless retired early. Therefore, every new blast furnace approved now extends the period of high emissions and increases the likelihood of costly early closures later.

For UK businesses, these dynamics create supply chain implications. Companies sourcing steel or steel-intensive products from China face growing pressure to account for embodied carbon in procurement decisions. Public sector buyers following carbon reporting requirements under PPN 06/21 must increasingly evaluate the emissions associated with construction materials and infrastructure components.

Manufacturers exporting to China or participating in Belt and Road-linked projects should also consider how carbon intensity affects tender competitiveness. As climate standards tighten globally, high-carbon supply chains will face regulatory and reputational risks. Consequently, businesses with lower-carbon alternatives may gain commercial advantages in international markets.

Industrial policy and infrastructure planning shape future emissions

China’s approach to steel production illustrates how industrial policy decisions influence climate outcomes for decades. The country’s continued investment in coal-based capacity reflects competing priorities between economic development, employment, and decarbonization.

The Belt and Road initiative adds another layer of complexity. Infrastructure projects stimulate economic activity and strengthen geopolitical relationships. However, they also generate substantial steel demand precisely when China needs to reduce output from its most carbon-intensive facilities.

This tension is not unique to China. Many countries face similar trade-offs between infrastructure investment and emissions reduction. Nevertheless, the scale of China’s steel production and its central role in global supply chains magnify the climate consequences of these choices.

For businesses operating internationally, understanding these dynamics matters. Supply chain emissions increasingly affect corporate reporting obligations, tender eligibility, and investor expectations. Companies sourcing materials or components with high embodied carbon may face growing costs as carbon border adjustments and other climate policies take effect.

UK firms should evaluate their exposure to steel-intensive supply chains, particularly those linked to Chinese production. Sustainable procurement strategies that prioritize lower-carbon materials can reduce compliance risks and improve competitiveness as climate regulations expand. Similarly, businesses subject to Scope 3 reporting requirements must account for emissions embedded in purchased goods and services.

The trajectory of China’s steel industry will significantly influence global emissions pathways through 2050 and beyond. Infrastructure built with high-carbon steel today will carry that carbon footprint for generations. Therefore, the choices China makes about steelmaking capacity in the coming years will determine whether its 2060 carbon neutrality target remains achievable.

Authoritative sources and further reading

For detailed analysis of China’s steel sector emissions and decarbonization pathways, the International Energy Agency provides comprehensive data and policy recommendations at iea.org. The UK government’s approach to embodied carbon in public procurement is outlined in guidance available at gov.uk.

Businesses seeking to understand Scope 3 reporting requirements and supply chain emissions accounting can refer to the Greenhouse Gas Protocol, which establishes international standards for corporate carbon measurement. Additionally, the British Standards Institution offers guidance on steel specifications and carbon reduction through its technical standards.

Companies evaluating carbon-intensive supply chains or preparing for tightening climate regulations may benefit from ESG compliance support that addresses reporting obligations and strategic planning for a lower-carbon economy.