Brick Kilns and the Changing Face of Nepal’s Tarai

Arbind Chaudhary

The Tarai plains of Nepal, long celebrated as the country’s agricultural heartland, are undergoing a transformation that is both rapid and deeply unsettling. What was once a mosaic of fertile fields, green vegetation, and thriving rural settlements is increasingly punctuated by the presence of brick kilns—towering chimneys, mounds of fired bricks, and deep pits where nutrient-rich topsoil once existed. As urbanization and reconstruction fuel an ever-growing demand for bricks, the Tarai has become the center of brick production for the entire country. Yet behind the visible growth of this industry lies a complex web of ecological degradation, public health threats, and sustainability challenges that threaten not only the Tarai but the future of Nepal itself. 

The brick kiln industry is often described as a backbone of Nepal’s construction sector, but rarely is it acknowledged as a major driver of land-use change. Kilns in the Tarai do not merely occupy land—they consume it. The production of bricks requires substantial quantities of topsoil, which is stripped from agricultural fields surrounding the kilns. This fertile alluvial soil, created over centuries through natural deposition processes, is the very foundation of the Tarai’s agricultural productivity. Once removed, it is irreversibly lost. The conversion of living soil into fired bricks leaves behind gaping pits of barren subsoil, incapable of supporting crops and often abandoned after extraction. These pits disrupt drainage patterns, reduce groundwater recharge, and permanently reduce the region’s capacity to produce food.

This silent erosion of agricultural land is particularly alarming in a country where food security is already fragile. The Tarai is responsible for the majority of Nepal’s cereal, vegetable, and fruit production, and its soils are among the most productive in South Asia. Yet as brick kilns expand, these fertile lands are shrinking. Farmers frequently report decreased yields in fields near kilns, not only due to soil extraction but also because dust and emissions from chimneys settle on crops, impeding photosynthesis and reducing plant health. In a warming climate, where droughts, unpredictable rainfall, and heatwaves are already straining agricultural systems, the deliberate destruction of arable land is a contradiction that Nepal can ill afford.

The environmental implications of brick kilns extend far beyond the fields. Most kilns in Nepal operate using coal—much of it imported from India or beyond—along with a mix of firewood, rubber, and industrial waste in some cases. The burning of these fuels releases a hazardous blend of pollutants into the air, including fine particulate matter, sulfur dioxide, nitrogen oxides, carbon monoxide, and black carbon. Black carbon is especially harmful; it is a potent climate-warming agent that darkens snow and ice surfaces in the Himalayas, accelerating glacier melt. In the already heat-prone Tarai, these emissions contribute to rising local temperatures, reduced air quality, and worsening seasonal haze. The region, once known for its lush greenery and open skies, is now often enveloped in a blanket of smog, especially during winter months.

Such environmental degradation inevitably spills over into public health. Communities living near brick kilns—often among the poorest and most marginalized—are exposed to continuous pollution throughout the year. Children inhale fine particulate matter that their developing lungs cannot filter, leading to chronic respiratory conditions such as asthma and bronchitis. Pregnant women face heightened risks of complications, while the elderly experience increased cardiovascular stress. For the laborers working within the kilns, many of whom live on site with their families, exposure is even more severe. Without protective equipment and with limited access to healthcare, these workers bear the heaviest burden of a largely unregulated industry. The cost of treating respiratory and cardiovascular illnesses places added financial pressure on families already struggling to make ends meet.

Amid these local pressures, the brick kiln issue also carries national and global significance. Nepal, as a signatory to the Paris Agreement, has outlined ambitious climate goals in its Nationally Determined Contributions (NDCs), including commitments to reduce air pollution, transition to cleaner energy, promote sustainable agriculture, and enhance ecosystem resilience. However, the expansion of coal-based brick kilns directly undermines several of these objectives. Industrial emissions from kilns remain one of the largest sources of black carbon in the country, threatening Nepal’s ability to meet its pollution-reduction targets. The loss of agricultural land weakens climate-resilient food systems, while poor labor and environmental practices challenge Nepal’s broader aspirations for sustainable and inclusive development.

Yet despite these concerns, brick kilns also represent a sector ripe for transformation. Cleaner kiln technologies—such as Vertical Shaft Brick Kilns (VSBK), Zig-Zag kilns, and Hybrid Hoffmann Kilns—are far more efficient and emit significantly fewer pollutants than traditional methods. Countries across Asia have begun adopting such technologies with notable success, demonstrating that industry growth does not have to come at the expense of environmental health. In Nepal, however, widespread adoption remains hindered by lack of enforcement, insufficient incentives, and the perception that clean technologies are costly or complicated to operate. In reality, transitioning to greener production methods could provide long-term economic benefits through reduced fuel consumption, higher quality bricks, healthier communities, and alignment with national climate commitments.

Beyond technological changes, Nepal must also reimagine how land is valued and used. Stricter regulation of soil extraction, mandatory rehabilitation of degraded land, and promotion of alternative construction materials are essential steps toward sustainability. Compressed stabilized earth blocks (CSEBs), unfired bricks, recycled construction materials, and other low-carbon alternatives have already proven effective in rural housing and public infrastructure projects. Encouraging their widespread use would reduce pressure on agricultural soils while supporting innovation in Nepal’s growing green economy.

Public health must also be placed at the center of kiln regulation. Creating buffer zones between kilns and settlements, conducting regular air quality monitoring, and ensuring safe working conditions are necessary measures to protect vulnerable communities. Strengthening local governments’ capacity to enforce environmental standards would create accountability and prevent the unchecked expansion of kilns in ecologically sensitive areas.

Recently, modern housing has begun shifting away from traditional soil-based bricks toward cleaner, more sustainable construction technologies, reshaping not only the materials we build with but also the lifestyles we aspire to. Around the world, innovators are turning to CSEBs, fly-ash bricks, aerated autoclaved concrete blocks (AAC blocks), and recycled construction materials to reduce the environmental footprint of building homes. Unlike soil bricks—which depend on the destructive extraction of fertile topsoil and the burning of coal—these alternatives are manufactured with minimal emissions, greater energy efficiency, and far less ecological damage. In India, for example, the city of Puducherry’s Auroville Earth Institute pioneered CSEB production, creating thousands of affordable homes using earth without depleting farmland or burning coal. Kenya has adopted similar approaches through its National Housing Corporation, where soil is compressed with small amounts of cement, replacing the need for fired bricks entirely. Even major global initiatives like the United Nations’ “Green Affordable Housing Program” promote low-carbon materials such as AAC blocks and recycled aggregates, recognizing that sustainable construction is essential for climate resilience. These international experiences highlight a future in which Nepal, too, can transition toward environmentally conscious materials, reducing pressure on the Tarai’s fertile soils while embracing modern, low-carbon housing that supports healthier, more sustainable living.

Ultimately, the future of the Tarai depends on a balanced approach that honors both economic development and environmental stewardship. Brick kilns will continue to play a role in Nepal’s growth, but their operation must align with national goals for sustainability, climate resilience, and public health. The figure of a kiln rising above the farmlands is a stark reminder of what is at stake: fertile soil that sustains millions, clean air that communities depend on, and ecosystems that shield Nepal from climate extremes. If Nepal is to build a greener, healthier, and more resilient future, it must treat the protection of the Tarai not as an optional aspiration but as a national imperative.

Arbind Chaudhary is the Executive Chairperson of the Policy Research Foundation, Kathmandu, Nepal, and the views expressed are solely those of the author.