The review, published in Environmental and Sustainability Indicators, examines how renewable energy and other low-carbon interventions could alter that balance. Its central message is not that decarbonization should be slowed, but that it must be designed as more than an engineering project. Solar farms, wind installations, hydropower schemes, electrification programs and clean-cooking technologies can cut emissions and improve health, yet each may also carry environmental costs depending on where and how it is deployed. The authors describe this as a “dual-edged” transition. A fossil-fuel system imposes widespread pollution and climate harms, while a renewable system can shift some burdens toward land, minerals, habitats and communities located near extraction sites or new infrastructure.

The researchers conducted a systematic literature review following the PRISMA 2020 framework, a widely used standard for making evidence searches transparent and reproducible. They searched Scopus, ScienceDirect, PubMed, Taylor & Francis Online and ProQuest for peer-reviewed studies published from January 2020 through May 2025 in English or Indonesian. Their search combined terms related to renewable and clean energy, public health and Southeast Asian countries, including Indonesia, Malaysia, the Philippines, Singapore, Thailand and Vietnam. The review question was structured using the Population–Exposure–Outcome framework: the population included communities and vulnerable groups; the exposure included renewable energy, electrification and clean cooking; and the outcomes included pollution-related disease, mortality, hospital visits, disability-adjusted life years and broader measures of well-being.

That search began with 2,435 records. After 286 duplicates were removed, 2,149 titles and abstracts were screened independently by reviewers. Most were excluded because they examined inappropriate populations, non-renewable energy, outcomes unrelated to health or study designs that did not meet the review’s requirements. Twenty-nine articles progressed to full-text assessment, and five were excluded during quality appraisal. The final synthesis included 24 studies. Three experts in environmental engineering, public health and energy systems were involved in screening, with disagreements resolved through discussion or adjudication by a third reviewer. The authors also assessed the reliability of reviewer agreement and used design-specific tools to judge the credibility of the included evidence.

This methodological detail matters because the evidence spans very different kinds of research. Some studies used observational or panel-econometric methods to examine relationships between energy systems, pollution and health. Others applied quasi-experimental approaches, such as difference-in-differences analysis, to compare outcomes before and after an intervention or between affected and unaffected groups. Economic evaluations estimated costs and benefits, while life-cycle assessments tracked environmental impacts across the stages of an energy technology. Chemical-transport and risk-assessment models were used to connect emissions with population exposure. Because no single method can capture all dimensions of an energy transition, the review matched appraisal tools to study design, applying Joanna Briggs Institute checklists to several analytical approaches and the CASP framework, alongside ISO standards, to modeling and life-cycle work.

The potential health benefits are substantial. Earlier research examined by the authors indicates that cleaner household cooking methods can reduce health problems by as much as 97 percent in some Southeast Asian settings. Local solar systems have been associated with reductions in community illness of up to 25 percent. These interventions can reduce exposure to smoke from solid fuels, lower concentrations of fine particles and toxic gases, and improve household energy reliability. At the regional scale, replacing coal and gas with lower-emission energy could reduce the pollutants that contribute to asthma, chronic respiratory disease, heart attacks and strokes. The review also connects this logic with Global Burden of Disease analyses, which provide standardized estimates of disease incidence, prevalence and disability-adjusted life years. Such measures allow health gains from decarbonization to be compared across countries and over time rather than treated as isolated local outcomes.

But a technology that is clean at the point of use is not necessarily impact-free across its entire life cycle. Solar panels, batteries, transmission systems and electric vehicles require large quantities of metals and minerals, including copper, cobalt, aluminum, nickel, manganese and rare-earth elements. Mining and processing can transform forests, fragment habitat, contaminate soil and water, and increase pressure on species already threatened by land-use change. Hydropower can alter river flows, block fish migration and inundate ecosystems. Roads, transmission corridors and industrial zones can open previously isolated landscapes to further development. The review therefore places biodiversity and ecosystem health alongside air quality and human disease, arguing that an assessment focused only on operational emissions can overlook damage embedded in supply chains and infrastructure.

This problem is especially important for resource-rich countries such as Indonesia, where nickel extraction and processing are tied to global demand for batteries and renewable technologies. The transition is materially interconnected: economies deploying renewable energy may depend on imported ores and concentrates, while the ecological and health risks of extraction are concentrated in the countries that supply them. Research cited in the review suggests that renewable-energy deployment is associated with greater demand for energy-transition minerals and rare-earth imports in both the short and long term. Supply chains concentrated among a small number of producing and refining countries can create geopolitical and economic vulnerabilities, but they can also produce an uneven geography of environmental harm. The communities living near mines, smelters and transport routes may bear pollution and land disruption even when the climate benefits are realized elsewhere.

That uneven distribution turns the energy transition into an issue of energy justice as well as emissions reduction. Justice involves who receives reliable and affordable electricity, who participates in decisions, whose land is used and who is exposed to pollution or displacement. In Indonesia and other parts of Southeast Asia, expanding clean-energy access is often treated primarily as a question of distributing benefits. The review argues that participation and representation deserve equal attention. A project can increase national generating capacity while leaving nearby communities without dependable electricity or meaningful influence over its design. It can also shift pollution from urban power plants to rural mining districts, replacing one pattern of environmental inequality with another. Policies that ignore these dynamics risk undermining public trust and reproducing the very inequities a sustainable transition is supposed to reduce.

The study’s bibliometric analysis helps explain why these trade-offs remain difficult to manage. Mapping 381 related publications revealed two largely separate research clusters: one centered on renewable energy, decarbonization and energy transition, and another focused on Southeast Asia, extraction and economic growth. Explicit epidemiological measures and public-health outcomes were weakly connected to both. Energy justice has begun to appear in the literature, but it remains only loosely linked to evidence about who experiences health improvements and who faces new risks. The authors call for a more integrated research agenda that combines epidemiology, ecology, engineering, economics and community participation. For policymakers, the implication is direct: renewable-energy planning should include health-impact assessments, biodiversity safeguards, life-cycle accounting for minerals, transparent consultation and monitoring of vulnerable populations. The goal is not merely to build a low-carbon power system, but to ensure that cleaner energy also produces healthier communities and living ecosystems.

The research team, led by Zhang, Wan, and Estoque, applied advanced spatial analysis techniques and high-resolution satellite imagery to track and quantify land-use changes across Southeast Asia, a region characterized by rapid economic growth, burgeoning population centers, and intensifying agricultural demands. Their findings reveal that the past two decades have witnessed unprecedented rates of habitat conversion driven primarily by the dual forces of urban sprawl and cropland intensification. This study meticulously maps how these expansions have fragmented, degraded, and ultimately diminished natural habitats, posing existential threats to biodiversity hotspots.

Technically, the authors leveraged an integrative approach combining geographic information systems (GIS), machine learning classification algorithms, and time-series land cover datasets from multiple global environmental archives. This enabled a granular assessment of land cover transitions at a resolution rarely achieved in regional scale studies. Furthermore, the team deployed robust statistical models to link proximity and intensity of urban and agricultural expansion with habitat loss metrics, thus revealing not only the spatial patterns but the causal relationships at play.

One of the study’s standout contributions is its delineation of contrasting spatial signatures between urban expansion and cropland growth. Urban areas tend to expand in concentrated, mosaic-like patterns, causing intense habitat fragmentation particularly along metropolitan fringes. Conversely, cropland expansion spreads over larger contiguous tracts, converting forests and wetlands into monoculture fields or mixed farming systems. These differing modes of land-use change yield unique ecological consequences, affecting species movement, genetic flow, and ecosystem services in nuanced ways.

The authors emphasize that Southeast Asia’s natural habitats, ranging from tropical rainforests and peatlands to mangroves and grasslands, perform critical ecological functions beyond their intrinsic biodiversity value. These landscapes act as carbon sinks, buffer against climate extremes, regulate hydrological cycles, and sustain millions of local livelihoods. The dual assault from urban and agricultural development, therefore, has far-reaching implications, potentially undermining regional climate resilience, food security, and socio-economic stability.

Moreover, the spatially explicit findings spotlight several “hotspots” where habitat loss is especially acute. These zones often coincide with economically vibrant regions undergoing rapid infrastructure development, such as peri-urban hubs undergoing explosive population growth. The study articulates how unchecked urban expansion adjacent to existing cropland intensification accelerates a feedback loop of habitat decline, exacerbating land degradation and biodiversity loss at unprecedented rates.

Crucially, Zhang and colleagues draw attention to the varying policy and governance challenges intertwined with land-use dynamics. Urban growth is frequently propelled by market-driven real estate developments combined with incomplete urban planning frameworks. Meanwhile, cropland expansion is tied to national food security strategies, agrarian policies, and global market demands. The research argues that integrated policy approaches balancing urban planning with sustainable agricultural practices are essential to decelerate natural habitat attrition.

The methodological rigor of this study also sets a new benchmark for future land-use change research. By innovatively fusing remote sensing data with socio-economic zoning and ecological modeling, the authors provide a replicable framework for other biodiversity-rich regions facing similar pressures. This integrative research paradigm is critical for crafting nuanced, spatially aware conservation interventions capable of accommodating human development needs while preserving ecological integrity.

Attention is also drawn to the role of cropland intensification in amplifying habitat loss beyond mere expansion. Intensification often entails conversion of fallow or natural buffer lands into productive fields, thereby eroding landscape heterogeneity needed for ecological networks. This subtle yet significant driver of habitat decline underscores the complexity in managing agricultural landscapes sustainably within rapidly transforming regions.

Importantly, the study reveals temporal trends indicating that habitat loss rates are not uniform over time but correspond closely with economic cycles, policy shifts, and infrastructural investments. Episodes of accelerated urban development linked to mega-projects, for example, cause spikes in habitat conversion that ripple downstream to affect ecologically sensitive zones. Understanding these temporal pulses provides key insights for timing conservation interventions to maximize impact.

While highlighting these urgent challenges, the authors also explore potential pathways for mitigation. Regulatory zoning, the promotion of urban green spaces, adoption of agroecological farming methods, and strengthening of protected area networks are among the recommended strategies. The study underscores the necessity for cross-sector collaboration bringing together urban planners, agricultural stakeholders, conservationists, and local communities to co-create resilient landscapes.

The Southeast Asian context uniquely underscores the tension between economic aspirations and ecological sustainability, a challenge echoed globally. Urban and agricultural expansions are often seen as engines of development and poverty alleviation. This research does not dispute their importance but rather calls for innovative approaches that marry development objectives with ecosystem stewardship, using science-driven land-use planning to reconcile competing demands.

It is hoped that these findings will galvanize policymakers and global actors to recognize the high stakes involved in Southeast Asia’s land-use trajectories. As the region stands at a crossroads, the choices made today will determine the fate of countless species and millions of human livelihoods. This study provides a clarion call to harness technology, data, and inclusive governance to craft a future where urban growth and agricultural productivity coexist with flourishing natural habitats.

This work also opens exciting pathways for further research. Future studies might incorporate socio-economic behavioral models to better understand decision-making drivers behind land-use choices, or explore ecosystem service valuation to quantify the economic benefits of habitat conservation. Expanding the research to include climate change interactions and resilience modeling could deepen the understanding of compounded pressures on Southeast Asia’s natural environments.

In sum, this comprehensive analysis by Zhang, Wan, and Estoque offers unprecedented spatial detail and mechanistic insights into how human land-use expansions are reshaping Southeast Asia’s natural habitats. It challenges the scientific community and decision makers alike to integrate ecological imperatives into development agendas robustly. The merging of technical precision with urgent conservation messaging makes this study both an essential scientific contribution and a powerful catalyst for transformative action in one of the world’s most ecologically critical regions.

Subject of Research: Impacts of urban and cropland expansions on natural habitats in Southeast Asia

Article Title: Impacts of urban and cropland expansions on natural habitats in Southeast Asia

Article References:
Zhang, X., Wan, W. & Estoque, R.C. Impacts of urban and cropland expansions on natural habitats in Southeast Asia. Nat Commun 16, 8479 (2025). https://doi.org/10.1038/s41467-025-63384-4

Image Credits: AI Generated