IN THE crowded alleys of Dhaka, beside busy highways, in industrial belts and around informal recycling yards, a poison continues to spread quietly through air, soil, water and food. It accumulates slowly, enters homes invisibly, settles into children’s bodies and leaves behind damage that may last a lifetime. That poison is lead. Although it has for long been globally recognised as one of the most dangerous environmental toxins, Bangladesh still treats lead exposure as a peripheral issue.
Lead remains embedded in modern industrial and consumer life because it is cheap, durable, malleable and resistant to corrosion. It is used in batteries, paints, pipes, electronics, metal alloys, cosmetics, construction materials and numerous informal manufacturing processes. In Bangladesh, the widespread use of lead has created conditions for continuous exposure. Informal battery recycling workshops, often in densely populated neighbourhoods, release toxic dust into the surroundings. Old lead-based paints still exist. Industrial emissions contaminate soil and waterways while a unsafe handling of e-waste and scrap materials spreads pollution into the environment.
The danger of lead lies partly in how silently it works. Unlike many illnesses that produce immediate symptoms, lead poisoning often develops gradually. Children are especially vulnerable because their bodies absorb lead more easily than adults. Even low levels of exposure can damage brain development, reduce learning capacity, impair memory and create behavioural problems that may persist into adulthood. Behind poor academic performance, concentration difficulties or developmental delays, there may be a toxic exposure that could have been prevented.
Pregnant women face another layer of danger. Lead stored in bones can re-enter the bloodstream during pregnancy, affecting foetal development and increasing the risk of long-term neurological harm to infants. Workers involved in battery dismantling, metal recycling or smelting operations often endure chronic exposure that damages kidneys, raises blood pressure and contributes to cardiovascular diseases. Families living near polluted industrial zones face continuous contamination.
The World Health Organisation says that no safe level of lead exposure exists. Once inside the body, lead mimics calcium and accumulates in bones, tissues and organs. It disrupts neurological function, damages cardiovascular systems, weakens cognitive development and contributes to long-term chronic illnesses. The consequences are not limited to individual suffering. They extend into national productivity, educational outcomes and economic development.
The WHO estimates that around 1.5 million deaths in 2021 were linked to lead exposure, primarily through cardiovascular diseases. Some studies place the annual death toll much higher when wide health impacts are considered. In Bangladesh alone, research published in Lancet Planetary Health estimated that about 138,000 adult cardiovascular deaths each year may be associated with lead exposure. These are not abstract numbers. They represent workers, parents, elderly people and children whose lives are shortened or permanently altered by an environmental hazard.
Yet, despite years of warnings, policy responses remain fragmented and insufficient. Environmental laws exist on paper, but enforcement remains weak, especially where powerful industrial interests are involved. Informal sectors often operate outside effective monitoring systems while regulatory agencies suffer from limited capacity, lack of coordination and weak oversight mechanism. The issue also receives far less public attention than other health crises because lead poisoning is usually invisible. It does not produce headlines the way epidemics or disasters do although the effects may be equally devastating over time.
The burden falls heavily on poorer communities. Families living near recycling yards, industrial clusters or contaminated waterways often lack the resources to relocate or seek medical care. Children from low-income households become trapped in a cycle where environmental exposure contributes to educational disadvantage, poor health and reduced future opportunities. Lead poisoning, therefore, becomes not only a medical issue but also an issue of inequality and environmental injustice.
Safer alternatives already exist and they have successfully been adopted in many parts of the world. Lead-free paints, safe battery technologies, improved recycling systems and non-toxic plumbing materials have significantly reduced exposure in many countries. The United States phased out leaded gasoline decades ago. European countries strengthened restrictions on industrial emissions and consumer products. Several African countries have also begun introducing safe battery recycling practices and reducing lead contamination. The examples show that progress is neither impossible nor unrealistic. Political commitment, regulation and sustained public education can reduce the exposure.
Bangladesh needs a similarly coordinated response. Environmental laws must be enforced far more rigorously. Informal battery recycling and smelting operations require strict oversight and safe waste management systems. Lead-containing paints and hazardous consumer products should be gradually phased out. Continuous monitoring of soil, water and air quality is necessary in industrial zones and densely populated urban areas. Awareness campaigns must inform communities of how exposure occurs and why prevention matters. Medical screening targeting children and pregnant women can help to detect exposure before irreversible damage occurs.
The conversation around lead cannot remain confined to technical policy circles alone. This is a human issue. A child losing cognitive potential because of contaminated surroundings is not a medical issue. A worker developing chronic illness from toxic exposure is not merely an occupational hazard. Entire communities carrying the burden of pollution and industries making profit reflects a failure of social responsibility and governance.
The cost of inaction will continue to appear in hospitals, struggling classrooms, reduced productivity and shortened lives. Bangladesh still has the opportunity to prevent further damage, but that window will not remain open indefinitely. Without urgent intervention, this silent poison will continue, leaving behind consequences that may take decades to repair.
Shahiduzzaman is a freelance writer.
