The air quality in New Delhi and its surrounding areas has turned hazardous as a dense layer of smog blanketed the Indian capital. Several parts of Delhi recorded an air quality index (AQI) of 400 and even 450 – a level considered as “severe” under international pollution standards.
Every winter, air pollution in Delhi spikes around this time when cold air traps smoke and fumes from fireworks, stubble burning and heavy traffic. The crisis is aggravated by vehicular and industrial emissions, massive road dust, construction activities and coal and biomass-fired residential heating.
As dozens of Indian cities grapple with “poor” or “very poor” air quality, per India’s pollution watchdog, China serves as a model for its neighbouring nation. Beijing, through stringent measures and effective air pollution control policies, has made a considerable effort to improve its air quality while also achieving impressive economic growth.
Twenty years ago, Beijing was crowned as the world’s smog capital. China’s temporary emission reduction regulations for the 2008 Beijing Olympics set the stage for its war on air pollution. With the launch of a five-year national action plan in 2013, the country introduced a raft of measures, including the closure of coal-fired boilers, promoting public transport and new energy vehicles, accelerating technological reform of enterprises and boosting innovation and green energy.
Special emphasis was given to slashing the “particulate matter (PM2.5)”. These inhalable particles, equal or less than 2.5 microns in diameter, are a major source of air pollution and pose the greatest danger to human health over their ability to penetrate deep into the lungs and enter the bloodstream.
Beijing’s efforts, coupled with the establishment of an early warning and emergency response system, better regulation of pollution activities, relocation of factories from populated areas and incentives for farmers to discourage agricultural burning, made a lasting impact, showing a dramatic 35 percent improvement in highly polluted areas by 2017.
In the following years, Beijing continued its campaign against air pollution. Average PM2.5 concentration dropped by a half, from 72 micrograms per cubic metre (μg/m³) in 2013 to 36μg/m³ in 2019, dropping further to 29.3μg/m³ in 2024. Although substantially higher than the World Health Organization’s guidelines – 5μg/m³ – it still marked a major breakthrough in China’s push against air pollution.
Despite the challenges posed by the pandemic, China sustained its battle for blue skies, rolling out targeted air pollution control policies such as limiting construction-related emissions, deploying clean industrial technologies, cutting steel production, retiring old cars and encouraging the adoption of electric energy vehicles. The measures paid dividends as China’s capital transformed from an environmental backwater into an emblematic case of urban air quality governance. Blue skies are indeed back in Beijing, given PM2.5 concentration averaged 24.9μg/m³ in the first three quarters of 2025, per the government.
The recent improvement builds on prior gains. In 2022, average annual PM2.5 concentration across China fell to 29μg/m³, according to Chinese media, and the number of days classified as having good air quality in 339 cities reached 316 – a progress not many regional countries could match. As many parts of the world experienced rising PM2.5 levels, China’s steep reductions were so substantial that they single-handedly drove a decline in global pollution, highlighting the country’s outsized contribution to improving air quality worldwide.
Independent research supports the data. Thanks to timely government intervention, strong coordination between local and central administrations and international financial institutions, the Greater Beijing-Tianjin-Hebei Region notched a significant achievement. According to the Asian Development Bank, the region has made major gains in air quality: between 2015 and 2023, average annual PM2.5 levels fell by 44.2 percent, sulphur dioxide by 76.3 percent and nitrogen dioxide by 34.8 percent, while the share of days with good air quality rose by 10.3 points to 63.1 percent.
Experts underscore that China’s environmental frameworks have boosted cross-sector cooperation and spurred active participation from industries that were once major polluters. Over the years, Beijing has developed the world’s largest and most comprehensive new energy industrial chain. Its leadership in producing renewable energy and manufacturing electric vehicles positions it at the centre of the global clean energy transition, making it an important actor to combat air pollution at home and abroad.
With Chinese gross domestic product (GDP) growing by more than 73 percent between 2013 and 2024 and PM2.5 concentrations plunging to 26μg/m³ in the January-September period, the country demonstrates how a consistent, policy-driven approach can maintain a high growth rate and still strive to deliver clean air to its people. This experience offers a precedent for India and other nations, pursuing to curb pollution without impeding their development goals.
Air pollution is the greatest environmental health risk. It knows no borders, exacerbates climate change, causes economic losses and reduces agricultural productivity. Even in China, where three-quarters of cities met their annual PM2.5 targets in 2024, the monster is resurging sharply across several regions, urging Beijing to intensify its own measures and ensure enforcement.
The scale of this challenge necessitates strengthening cooperation and sharing best practices, particularly among countries in South, Southeast and East Asia that are worst affected. Being at the forefront of the air pollution crisis – what China faced a decade earlier amid rapid development and urbanisation – India cannot afford to be complacent in drawing valuable lessons both from Chinese past successes and nascent challenges.
By adopting elements of China’s clean-air playbook – from shutting down highly polluting factories and expanding electric bus fleets to establishing real-time dust monitoring at construction sites and reinforcing interprovincial coordination – India could make meaningful progress in securing cleaner air and a sustainable future for its people, while advancing its own development and economic growth.
