India’s Changing Air: Heat, Pollution and the New Environmental Anxiety
Heat, Pollution and the New Environmental Anxiety
For much of India, environmental anxiety no longer begins with an unusual weather event or a particularly bad winter. It has become part of ordinary life. A summer afternoon can bring dangerous heat, the monsoon can arrive with both intense rainfall and long dry intervals, and by the time autumn reaches the northern plains, residents begin watching air-quality readings almost as closely as weather forecasts. What makes the situation more serious is not one isolated environmental problem, but the way heat, pollution, urbanisation, transport, industry, agriculture and changing weather patterns increasingly interact with one another.
India Is Getting Warmer
The temperature story provides an important starting point. According to the India Meteorological Department’s assessment of 2025, India’s annual mean land-surface air temperature was 0.28°C above the 1991–2020 average, making 2025 the eighth-warmest year since nationwide records began in 1901. It was also preceded by 2024, which remains the warmest year on record, at 0.65°C above the long-term average. The figures may appear modest when expressed as national averages, but temperature changes of this scale can influence heat stress, water demand, electricity consumption, agriculture and the behaviour of atmospheric pollutants.
The experience on the ground can be much more severe than an annual average suggests. During 2026, the India Meteorological Department repeatedly warned of heat-wave conditions across parts of northern, central and eastern India, including Uttar Pradesh, Bihar, Rajasthan and several other regions. Its May outlook had already indicated the likelihood of above-normal heat-wave days in several states, while later bulletins recorded severe heat-wave conditions in parts of eastern Uttar Pradesh and other areas. Heat is therefore no longer simply a summer inconvenience; it is becoming an increasingly important factor in public health, energy planning and urban life.
The Air We Breathe
Air pollution is the other half of India’s environmental problem, and the latest available annual data remains deeply concerning. IQAir’s 2025 assessment puts India’s annual average PM2.5 concentration at 48.9 micrograms per cubic metre, roughly 9.8 times the World Health Organization’s annual guideline of 5 micrograms per cubic metre. India ranked sixth among 143 countries and regions in the report’s country-level pollution ranking. More importantly, the national average hides enormous differences between locations, with several cities in northern India experiencing far higher concentrations.
Delhi remains an especially stark example. Its annual average PM2.5 concentration in 2025 was 99.6 micrograms per cubic metre, although that was an improvement over 108.3 in 2024. Delhi was nevertheless ranked as the world’s most polluted major city in IQAir’s 2025 assessment. The distinction matters because it shows why occasional improvements in individual years should not be confused with the resolution of the underlying problem. A city can make measurable progress and still expose its residents to pollution levels that remain far above health-based recommendations.
The problem also cannot be reduced to Delhi. India’s pollution is produced through a combination of transport emissions, coal and other fossil-fuel combustion, industrial activity, construction and road dust, waste burning, household energy use and seasonal agricultural burning. The relative importance of each source changes from one region to another, which is precisely why a single national solution or a city-by-city approach is unlikely to be enough. The World Bank’s 2026 assessment argues for management at the level of entire airsheds because pollution crosses administrative boundaries; its new programmes in Uttar Pradesh and Haryana are intended to improve air quality for roughly 270 million people.
Pollution Is a Health Problem Before It Becomes a Visibility Problem
One of the weaknesses of public discussion around air pollution is that it often begins and ends with photographs of a grey skyline. The more consequential damage is less visible. Fine particulate matter can enter deep into the respiratory system and is associated with cardiovascular disease, stroke, lung cancer, chronic respiratory disease and other serious conditions. The State of Global Air 2025 report estimates that India and China each recorded more than two million deaths attributable to air pollution in 2023, underlining the scale of the health burden in the two most populous countries.
This burden is not distributed equally. Children, older adults, outdoor workers and people with existing health vulnerabilities can face greater risks, while poorer communities often have fewer options for avoiding polluted environments. Household air pollution also remains relevant despite major improvements in access to cleaner cooking fuels. State of Global Air data shows that the proportion of India’s population exposed to household air pollution from solid fuels fell from 63% in 2013 to 42% in 2023, which is substantial progress, but it also demonstrates that the household dimension of air pollution has not disappeared.
Climate Change and Pollution Are Becoming Interconnected
It is tempting to treat climate change and air pollution as separate subjects: one belonging to global temperature discussions and the other to city-level environmental regulation. In practice, they overlap. Heat can influence the chemistry of the atmosphere and contribute to the formation of ground-level ozone, while stagnant weather conditions can allow pollutants to accumulate. Dry conditions can increase dust, and changes in rainfall patterns can alter when and how pollutants are dispersed. At the same time, several sources of air pollution— particularly the burning of fossil fuels— also contribute directly to climate change.
The relationship becomes particularly complicated in India because different seasons produce different environmental pressures. Summer brings heat stress and, in some regions, dust and ozone concerns; the monsoon changes the atmospheric conditions and removes some pollutants but can also produce extreme rainfall; and the post-monsoon and winter period in northern India can bring stagnant air, agricultural burning and increased emissions together. The result is not one continuous environmental crisis of identical intensity, but a succession of overlapping pressures that affect different parts of the country at different times.
There Is Progress, but the Numbers Need Context
It would be inaccurate to describe India’s clean-air efforts as a complete failure. The National Clean Air Programme has now moved beyond its original planning stage and produced measurable improvements in a number of cities. According to a September 2026 government assessment, 108 of the 130 cities covered by NCAP recorded lower annual PM10 concentrations in 2025–26 compared with the 2017–18 baseline. Seventy-two cities recorded reductions of more than 20%, while 26 recorded reductions of more than 40%; 14 cities met the National Ambient Air Quality Standards for PM10.
Those figures deserve recognition, but they also need to be read carefully. A reduction in PM10 does not automatically mean that every pollutant has reached a safe level, nor does improvement in one city prove that the wider airshed has been cleaned. Government data for 2025–26 showed that 65 of the 130 NCAP cities met the national standard for annual PM2.5, while Delhi’s reported PM2.5 level remained at 102 micrograms per cubic metre. Progress, therefore, is real but uneven, and the remaining challenge is considerably larger than the most encouraging individual numbers suggest.
The Economics of Dirty Air
The economic cost of pollution is often discussed less than its medical consequences, even though the two are closely connected. When polluted air increases illness, the consequences extend beyond hospitals. People lose working days, families spend more on treatment, children miss school, employers face lower productivity and governments bear additional pressure on health systems. The World Bank estimates that in 2019, premature deaths and illnesses associated with air pollution resulted in about $36.8 billion in lost output, equivalent to roughly 1.36% of India’s GDP at the time.
This creates one of the central contradictions in India’s development story. The country needs roads, housing, electricity, factories, logistics networks and rapidly expanding cities, but the manner in which these are built determines whether economic growth also produces a healthier society. Cleaner transport, better public infrastructure, efficient industrial technology, dust management and coordinated regional planning should therefore not be treated as environmental luxuries. They are increasingly part of the basic economics of a functioning urban and industrial economy.
Technology Can Help, but It Cannot Replace Governance
India now has better monitoring networks, increasingly sophisticated forecasting systems and a growing ecosystem of technological responses to environmental problems. Air-quality sensors, satellite observations, pollution forecasting, electric mobility, cleaner industrial processes and digital public-information systems can all contribute to better decisions. The value of technology, however, depends on what happens after a problem is detected. Knowing that a neighbourhood has dangerous particulate levels is useful only if authorities, businesses and citizens have practical means of reducing exposure and emissions.
The same principle applies to policy. India’s recent shift toward airshed-based management is significant because pollution does not respect municipal borders. A factory outside one city can affect another city; agricultural burning hundreds of kilometres away can influence urban air; traffic and construction emissions can accumulate under the same weather system. Effective environmental policy therefore requires cooperation among states, cities, transport authorities, industries, agricultural communities and public-health institutions rather than treating every pollution episode as an isolated municipal event.
The Psychological Cost of Living With Environmental Uncertainty
There is also a quieter consequence that is difficult to measure. When people begin checking air-quality readings before deciding whether children should play outside, whether to exercise outdoors or whether it is sensible to open a window, the environment has entered ordinary psychological decision-making. The problem is no longer something that exists somewhere beyond the city; it becomes part of the mental calculation of everyday life.
That does not mean every resident develops a clinical anxiety disorder, and the term “eco-anxiety” should not be used casually as a diagnosis. But there is a broader environmental unease that is increasingly understandable: the feeling that familiar seasonal patterns are becoming less predictable and that some of the most basic conditions of life—reasonable temperatures, breathable air, reliable water and tolerable summers—can no longer be taken entirely for granted. For a country undergoing rapid urbanisation, that psychological dimension deserves as much attention as the statistics.
India’s Environmental Question Is Now a Development Question
India does not face a choice between development and environmental protection in the simplistic sense in which the debate is sometimes presented. The more important question is what kind of development can remain viable when hundreds of millions of people are exposed to environmental risks that reduce health, productivity and quality of life. The World Bank’s current approach to air pollution itself reflects this shift: the emphasis is increasingly on coordinated, long-term management of entire airsheds rather than temporary responses to individual pollution episodes.
There are reasons for cautious optimism. Cleaner household fuels have reduced exposure to indoor pollution, many cities are showing measurable reductions in PM10, monitoring has expanded and environmental policy is becoming more data-driven. But the scale of the remaining problem means that isolated technological solutions, seasonal restrictions or short-term emergency measures cannot carry the entire burden.
India’s environmental challenge is ultimately about the quality of everyday life. The question is not merely whether the country can bring down a particular AQI reading on a particular winter morning, or whether one summer is slightly cooler than another. It is whether India can build cities, industries, transport systems and energy networks in which clean air and climatic resilience are treated as essential infrastructure rather than as benefits that can be considered after economic growth has been achieved.
—Ashfaq Ahmad
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