A New Era of Environmental Injustice: The Hidden Costs of Critical Mineral Mining in the Green Transition
The global push to combat climate change and digitize economies has thrust critical minerals such as lithium, cobalt, and nickel into the spotlight. These elements are the crucial components that power electric vehicles, renewable energy infrastructure, and advanced digital technologies. Yet, as a groundbreaking report by the United Nations University Institute for Water, Environment and Health (UNU-INWEH) reveals, the extraction of these minerals is imposing severe environmental and health consequences on vulnerable communities worldwide. These hidden costs threaten to undermine the very sustainability goals that the green transition aims to achieve.
Mining operations for critical minerals demand extraordinarily high volumes of water, often in regions already beset by water scarcity. Lithium mining, for example, currently consumes an estimated 1.9 million liters of water per metric ton produced. On a global scale, 2024’s lithium production of approximately 240,000 tons necessitated about 456 billion liters of water — an amount equivalent to the annual domestic needs of 62 million people in sub-Saharan Africa. Notably, in Chile’s Salar de Atacama, lithium mining accounts for as much as 65% of regional water usage, severely stressing groundwater supplies and creating fierce competition with agriculture and local communities.
This depletion of water resources is not just an environmental concern; it has profound socio-economic repercussions. In Bolivia’s Uyuni region, for instance, lithium mining has directly impaired quinoa cultivation — a crop that not only sustains local nutrition but also forms the backbone of the regional economy. The heavy water requirements for mineral extraction thus translate into lost agricultural productivity, reduced food security, and diminished livelihoods for indigenous and rural populations whose lives are intertwined with the land.
Compounding these challenges, over 16% of known critical mineral reserves are located in high water-stress zones, while a staggering 54% of energy transition mineral projects lie on or near indigenous territories. This geographical overlap exposes some of the most marginalized communities to disproportionate environmental burdens, echoing historical patterns of resource extraction that have resulted in economic exclusion and social inequity. Far from being a neutral industrial activity, critical mineral mining embodies “sacrifice zones” where communities bear the brunt of ecological degradation while reaping few economic benefits.
The environmental damage extends well beyond water consumption. Rare earth mineral extraction produces colossal amounts of toxic waste. For every tonne of rare earth elements mined, roughly 2,000 tonnes of hazardous residue are generated, along with radioactive by-products and wastewater. The report estimates that global rare earth production in 2024 alone resulted in approximately 707 million metric tonnes of toxic waste — a volume sufficient to fill 59 million garbage trucks. Alarmingly, about 70% of this toxic waste originates from China, underscoring geographic concentrations that may amplify localized environmental crises.
The paradox intensifies when framed against the climate goals set by the Paris Agreement. Achieving the necessary decarbonization requires an unprecedented surge in mineral demand—an almost ninefold increase in lithium consumption and a doubling of cobalt and nickel demand by 2040. Without stringent governance frameworks, this surge risks deepening water insecurity, contaminating drinking water supplies, and perpetuating health crises in communities that contribute the least to global emissions but are bearing the heaviest burdens.
Health impacts on communities living near mining sites are stark and deeply concerning. In the Democratic Republic of Congo (DRC), a major cobalt producer, surveys revealed that 72% of residents near mines suffer from skin diseases. Furthermore, 56% of women and girls report gynecological problems, and birth defect rates in nearby maternal wards are alarmingly higher than average. Neural tube defects, lower limb abnormalities, and other congenital disorders appear at elevated rates, with cobalt levels detected at higher concentrations in umbilical cord blood than maternal blood, suggesting direct fetal exposure to toxic metals.
The social and psychological ramifications are equally profound. In mining towns such as Calama, Chile, and Mibanze, DRC, residents describe living under constant fear and anxiety, feeling “sacrificed” on the altar of global technological advancement. Chronic exposure to water insecurity and pollution has been linked to heightened rates of depression, anxiety, and tragically even suicide. Especially vulnerable are the children, with about 30% of DRC mining sites employing minors who often work without adequate health and safety protections, exacerbating risks associated with heavy metal exposure and environmental toxins.
Despite sitting atop vast mineral wealth, many affected nations remain economically marginalized. In the DRC, over 70% of the population survives on less than $2.15 per day, while foreign industrial mines control more than 80% of mineral output. This stark disconnect between resource wealth and human development mirrors the fossil fuel era’s inequities and raises urgent questions about who truly benefits from these “21st century oils.”
Urgent policy reform is critical to reversing these entrenched injustices. The UNU-INWEH report advocates for international mandatory due diligence standards to replace the current patchwork of voluntary compliance frameworks. Legally binding mechanisms are needed to ensure ethical sourcing, environmental justice, and pollution control. This includes adopting zero-discharge wastewater systems and independent monitoring of water use and heavy metal contamination to provide the transparency necessary for accountability.
Embracing circular economy approaches could drastically reduce the pressure on primary mineral extraction. Advanced recycling of batteries, electronics, and renewable energy components offers promising pathways to recover valuable materials while curtailing environmental harm. Moreover, ensuring affected communities receive a meaningful share of mining revenues through benefit-sharing agreements could empower better health, water, and education services—addressing systemic inequalities that currently leave them marginalized.
A critical piece of this governance framework must involve legal recognition of Free, Prior, and Informed Consent (FPIC) for indigenous peoples. Protecting their rights over lands affected by extraction is essential to prevent further disenfranchisement and ecological harm. Additionally, robust public health infrastructures and mandatory Health Impact Assessments must become standard. Mining companies should be held financially accountable for addressing health consequences in impacted regions.
Technological innovation also holds promise. Investment in low-water mining technologies such as direct lithium extraction (DLE) can dramatically reduce freshwater usage, offering a more sustainable approach aligned with urgent water conservation needs. Yet, technological fixes alone are insufficient without accompanying governance reforms that prioritize equity and environmental stewardship.
This troubling report challenges the global community to rethink the narrative of green growth. The current system externalizes environmental degradation and health risks, continuing a legacy of exploitative extractive industries. Without transparency, data accessibility, and binding regulations, the energy transition risks perpetuating cycles of poverty and ecological injustice, undermining the very Sustainable Development Goals it seeks to advance.
Ultimately, this investigation reveals that the transition to a green economy is not inherently just or sustainable—it depends on how humanity governs the supply chains underpinning it. As nations accelerate investments in clean energy and digital transformation, failing to address the water insecurity and health crises embedded in mineral extraction could leave millions more trapped in sacrifice zones. Ensuring this transition uplifts rather than uproots vulnerable communities requires urgent, coordinated international action.
The stakes could not be higher. Humanity’s collective rush towards a climate-resilient future demands confronting the uncomfortable truths buried beneath the surface of critical minerals mining. Only by facing these hidden environmental and social costs head-on can we hope to forge an equitable path to clean energy that truly benefits all, rather than deepening global divides. The future of sustainability hinges on inclusive governance, transparency, and respect for the rights and well-being of those on the frontlines of our planet’s most precious resources.
Subject of Research: Critical minerals mining, water insecurity, environmental and social justice in the energy transition
Article Title: Critical Minerals, Water Insecurity and Injustice
News Publication Date: 29-Apr-2026
Web References:
https://unu.edu/inweh/collection/unu-inweh-report-critical-minerals-water-insecurity-and-injustice
http://dx.doi.org/10.53328/INR25ABN002
References:
Nunbogu, A., Farsi, A., Matin, M., Madani, K. (2026). Critical Minerals, Water Insecurity and Injustice. United Nations University Institute for Water, Environment, and Health (UNU-INWEH), Richmond Hill, Ontario, Canada.
Image Credits: United Nations University Institute for Water, Environment and Health (UNU-INWEH)
Keywords
Critical minerals, lithium mining, cobalt, nickel, water insecurity, environmental justice, energy transition, renewable energy, rare earth elements, toxic waste, indigenous rights, sustainable development, health impacts
