China’s dramatic improvement in air quality over the past decade stands as one of the most significant environmental achievements in modern history. Since declaring a “war on pollution” in 2013, the country has reduced fine particulate matter faster than any other nation, according to the University of Chicago’s Air Quality Life Index. Yet recent reports of rising pollution in western and southern provinces have triggered questions about whether this progress is reversing and whether Chinese cities remain in a state of air quality crisis. This investigation examines the data on China’s air quality improvements, the regional variations in recent trends, and the complex relationship between industrial relocation and environmental outcomes.
Claim 1: China’s air quality has improved so dramatically that the “air quality disaster” narrative is entirely obsolete.
Evaluation: This claim captures the remarkable progress China has made but overlooks the persistence of serious challenges. From 2014 to 2022, average PM2.5 levels in China dropped faster than in any other country . Last year, nearly three-quarters of the country’s cities had average PM2.5 levels below the national standard limit of 35 micrograms per cubic metre . The level of PM2.5 in China’s cities was 36 percent lower than it had been in 2015 . These are genuine, verified improvements resulting from concrete measures including retrofitting coal power plants and implementing strict emission controls.
However, the national average masks significant regional variation and ongoing problems. The 2024 national average PM2.5 level was still well above the World Health Organization’s guideline value of 5 micrograms per cubic metre . In the first quarter of 2025, while eastern China’s overall air quality improved, pollution rose in provinces to the south and west. PM2.5 levels in Guangxi, Yunnan and Xinjiang were substantially higher than a year earlier, at 32 percent, 14 percent, and 8 percent respectively . Xinjiang’s yearly average level of 70 micrograms per cubic metre is double the national standard and 14 times the WHO guideline value .
The central government has acknowledged that further improvement is needed, setting a target for lowering the average annual PM2.5 level to less than 25 micrograms per cubic metre by 2035 . This represents a significant tightening of the current standard and acknowledges that current levels remain above what is ultimately desired.
Verdict: Misleading. China’s progress is real and substantial, but describing the situation as entirely resolved ignores persistent challenges, significant regional variations, and the government’s own acknowledgment that further improvement is needed.
Claim 2: The recent rise in pollution in western and southern China proves that the country’s environmental progress is reversing.
Evaluation: This claim requires examining both the data and the underlying causes of the regional increases. In the first quarter of 2025, the average PM2.5 level across all Chinese cities was down 5 percent year on year . Levels of major pollutants such as sulphur dioxide, nitrogen dioxide and PM10 particulates declined or remained stable nationally . This indicates that the overall trend remains positive.
The regional increases in Guangxi, Yunnan, Hainan and Xinjiang are real and significant. Guangxi experienced a 32 percent rise, Yunnan 14 percent, Hainan 11 percent, and Xinjiang 8 percent . However, the Centre for Research on Energy and Clean Air’s analysis attributes these increases to specific, identifiable factors rather than a systemic reversal.
In Kunming, Yunnan, 11.9 percent of the PM2.5 rise was due to anthropogenic emissions and 10.7 percent to weather conditions . In Urumqi, Xinjiang, the split was 9.2 percent anthropogenic versus 0.9 percent weather . This suggests that while human activity is the primary driver, meteorological factors play a significant role in some locations.
The anthropogenic emissions increases are themselves linked to specific sources: increased output from energy-intensive industries relocated to western China, firework displays during national festivals, and seasonal burning of crop stubble . These are localized challenges rather than indications that national pollution control efforts have failed.
Verdict: False. National data shows continuing overall improvement. Regional increases are localized and attributable to specific factors including industrial relocation and seasonal activities, not a reversal of national progress.
Claim 3: Industrial relocation from eastern to western China is the primary driver of rising pollution in the west.
Evaluation: This claim finds strong support in the data and policy analysis. Western China’s output of crude steel, pig iron and non-ferrous metals increased year on year in the first quarter of 2025 by 6 percent, 11 percent and 4 percent respectively . This compares with a slight decline in eastern China, the only part of the country where all three industries contracted .
The policy framework encouraging this shift is well-documented. In 2020, China began ramping up efforts to develop the western regions, prioritizing projects geared towards exploiting energy and resources . Under the State Council’s employment-first strategy announced in 2024, proposals were introduced for steering capital-, technology- and labour-intensive industries into central and western regions .
Economic incentives reinforce the policy direction. Electricity for large-scale industrial use is cheaper in western China than in the east due to more favourable conditions for generating power from diverse renewable resources . Energy generally accounts for over 10 percent of costs in conventional energy-intensive industries, creating an obvious incentive to relocate westwards .
The National Energy Administration’s new formulation of “power from the west of the country, utilised in the west of the country” explicitly aims to nudge energy-intensive industries to cluster where renewable-energy resources are most plentiful . This represents a deliberate policy strategy, not an unintended consequence.
In the first two years of the 14th five-year plan period, the average growth rate for industrial added value in western China was 5.2 percentage points above the national average . Xinjiang has attracted nearly CNY 500 billion of investment in its coal-to-chemical sector, with expectations that figure will surpass CNY 1 trillion during the 15th five-year plan period .
Verdict: True. Industrial relocation from eastern to western China is a deliberate policy strategy and a primary driver of rising industrial output and associated emissions in western provinces.
Claim 4: The shift to cleaner steel production methods is happening uniformly across China.
Evaluation: This claim is contradicted by regional data on steel production methods. China’s National Development and Reform Commission has added the electric arc furnace “short-process” method to its 2025 Catalogue of Encouraged Industries for Western China . This method uses electricity to produce crude steel from scrap steel and emits far less pollution than the traditional “long-process” method.
However, adoption varies dramatically by region. In central and western China, steel production mostly uses the long-process method, possibly due to the abundance of ores and coal in these regions and relative lack of scrap steel . In western China, the growth of pig iron output in the first quarter of 2025 is nearly double that of crude steel, indicating dominance of the more polluting long-process method .
In the east, pig iron output dropped further than did crude steel, reflecting an overt shift towards energy efficiency and carbon reduction among steelmakers, including widespread adoption of the short-process method . The contrast could not be starker: the east is transitioning to cleaner production while the west expands traditional, more polluting methods.
This divergence has direct implications for air quality. The long-process method produces crude steel from iron ore in blast furnaces fired by large quantities of coal, emitting far more carbon dioxide, sulphur dioxide, nitrogen dioxide and particulate matter pollution than the electric arc furnace method .
Verdict: False. Cleaner steel production methods are being adopted in eastern China while western and central regions continue to rely on traditional, more polluting long-process methods.
Claim 5: Guangxi’s severe pollution episodes are entirely due to industrial activity.
Evaluation: The data from Guangxi reveals a more complex picture involving cultural practices and weather conditions. Air pollution in Guangxi significantly worsened at the end of January 2025 with the start of the Spring Festival period . This was due to intensive firework use coinciding with stagnant weather conditions that trapped the resulting smoke .
On 29 January, the first day of the Lunar New Year, three cities in Guangxi recorded heavy pollution. In Nanning, the PM2.5 hourly concentration peak reached 1,632 micrograms per cubic metre at one point . In Yulin, the daily average concentration reached 428 micrograms per cubic metre .
An official report following severe pollution on 11 February stated that six counties in south-eastern Guangxi faced problems caused by straw burning, scattered coal use and fireworks . The report noted that these are traditional agricultural counties where such practices are deeply embedded.
The report also identified other sources: open burning of agricultural residue, excessive emissions from industrial facilities, and delays in ending the use of small coal-fired boilers . This indicates multiple contributing factors rather than a single industrial cause.
Guangxi’s first quarter 2025 PM2.5 level of 41 micrograms per cubic metre was its highest in at least three years . Inadequate efforts to mitigate the impacts of weather conditions, coupled with weak enforcement of regional firework bans and joint control measures, contributed to this outcome .
Verdict: Misleading. Guangxi’s pollution spikes are caused by a combination of industrial emissions, cultural practices like fireworks, agricultural burning, and weather conditions, not industrial activity alone.
Claim 6: China’s updated policy on crop stubble burning will worsen seasonal air pollution.
Evaluation: This claim requires examining the recent policy change and its potential implications. China’s key policy statement for rural development, the No. 1 Central Document, has replaced the blanket ban on crop stubble burn-offs with a more flexible mechanism for “restricted burning” . Several provinces are now piloting “time-limited, zone-specific” conditions for the activity .
The previous blanket ban was widely violated and difficult to enforce. Farmers often burned stubble illegally, creating enforcement challenges and unpredictable pollution episodes. The new approach theoretically allows for managed burning under controlled conditions, potentially reducing the most extreme pollution events.
However, the immediate effect has been concerning. The policy document notes that stubble burning during spring ploughing has become a major source of particulates, and there is an urgent need for stronger policy oversight . The transition to managed burning requires careful implementation and monitoring to prevent widespread pollution.
The policy change reflects a pragmatic recognition that outright bans were not working effectively. Whether the new approach improves or worsens outcomes will depend on the rigor of implementation, the adequacy of monitoring, and the compliance of farmers with time-limited, zone-specific restrictions.
Verdict: Uncertain. The policy change from blanket ban to restricted burning could either improve outcomes through managed burns or worsen pollution if implementation is weak. Early evidence suggests ongoing challenges requiring stronger oversight.
Claim 7: China’s westward industrial relocation strategy is incompatible with long-term air quality goals.
Evaluation: This claim addresses the fundamental tension revealed by the data. The central government has set a target for lowering the average annual PM2.5 level to less than 25 micrograms per cubic metre by 2035 . Achieving this would require a fall of more than 10 percent against 2024 national levels .
The westward relocation of energy-intensive industries, while economically rational and strategically encouraged, creates new pollution challenges in regions not previously designated as critical for pollution control . The original purpose of moving these industries westwards was to coordinate the development of clean energy with industry needs, reduce overall carbon intensity, and meet policy requirements for synergies in cutting pollution and reducing carbon .
However, multiple challenges remain. Grid planning for western China currently focuses on large-scale outbound transmission rather than local consumption . As more energy-intensive industries congregate there, the regional power grid becomes increasingly difficult to operate . Electricity demand in western China, rising rapidly and at a higher rate than the national average, is expected to peak later than in eastern China, placing additional stress on the capacity of western regions to absorb and coordinate their own clean energy supply and demand .
The outcome is not predetermined. Success depends on whether the clean energy transition in western China can keep pace with industrial growth. In provinces rich in renewable-energy resources such as Xinjiang and Inner Mongolia, coal power is expanding at a faster rate than clean energy . Despite thermal power’s declining share of the national energy mix, the overall energy transition is still not enough to offset the additional pollution from expanded production in steel, non-ferrous metals and related industries .
The Centre for Research on Energy and Clean Air argues that with pollution trending upwards in areas not designated as crucial for pollution control, national countermeasures during the 2026-2030 period will need to address the spatial distribution of energy-intensive industries and ensure coordinated regional planning . This means promoting low-carbon technology adoption, advancing industrial electrification, and accelerating the clean transition of energy systems, with eastern regions supporting western restructuring by exporting capital, technology and governance capability .
Verdict: True as a description of tension, uncertain as a prediction. The westward industrial relocation creates genuine tension with national air quality goals. Whether this tension resolves in favour of continued improvement or rising pollution depends on the pace and effectiveness of clean energy integration and pollution control measures in western regions.
Conclusion: Progress, Relocation, and the Next Frontier
China’s air quality story is no longer a simple narrative of crisis and improvement. The data shows remarkable progress since 2013, with national averages declining and most cities meeting current standards. Yet this aggregate success masks a more complex reality of regional variation and emerging challenges.
The central dynamic revealed by this investigation is the westward shift of energy-intensive industries. Eastern China, having borne the brunt of pollution for decades, is cleaning up through industrial transformation, cleaner production methods, and stricter controls. Western China, rich in energy resources and targeted for development, is attracting these same industries, bringing economic opportunity but also pollution risks.
The outcome of this transition is not predetermined. Western China has advantages that eastern regions lack: abundant renewable energy resources, newer industrial facilities that can incorporate cleaner technologies, and the opportunity to learn from eastern experiences. Whether these advantages translate into genuinely sustainable development or merely reproduce old problems in new locations depends on policy choices, technological adoption, and governance capacity.
The government’s 2035 target of 25 micrograms per cubic metre represents a genuine commitment to further improvement. Achieving this will require addressing the spatial distribution of industry, ensuring that clean energy deployment keeps pace with industrial growth, and extending effective pollution control to regions not previously prioritized.
For observers, the takeaway is that China’s air quality challenge has evolved. The era of blanket crisis has passed, replaced by a more nuanced struggle to manage the environmental consequences of continued development and industrial transformation. The next frontier is not cleaning up the east, but ensuring that the west does not repeat its mistakes.
