Author Archives: Nadjib Drouiche

About Nadjib Drouiche

Dr. Nadjib Drouiche is a multidisciplinary researcher and policy analyst with an extensive academic background and a strong record of scientific publications across several domains. His research interests span semiconductor technology, energetics, and environmental sciences, with a particular emphasis on desalination, wastewater treatment, and sustainable water management.

Waste Management Landscape in Algeria: Challenges and Opportunities

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The waste management sector in Algeria reflects a complex interaction between demographic dynamics, economic transformation, evolving regulatory frameworks, and persistent operational constraints. Over the past two decades, population growth, accelerated urbanization, and changing consumption patterns have led to a steady increase in waste generation, exerting growing pressure on municipal services, local authorities, and natural ecosystems. According to national data compiled by the National Agency of Waste (Agence Nationale des Déchets, AND), Algeria generates more than twelve million tonnes of domestic waste annually, a figure that continues to rise year after year [1]. When industrial, construction, and special waste streams are … Continue reading →

Black, Green, Blue, or Grey Carbon: Understanding the Hidden Colors of Climate Change

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Carbon lies at the heart of the planet’s major biogeochemical balances and constitutes an essential thread for understanding climate change, ecosystem degradation, and contemporary ecological transition strategies. Far from being a uniform entity, carbon; manifests itself in different forms and dynamics, often described through color codes black, brown, blue, green, red, and grey, which help to better grasp its origin, behavior in the environment, and its economic, social, and climatic implications. Although simplified, this typology has become established in scientific and policy debates as a pedagogical and analytical tool that facilitates the design of public policies, financial mechanisms, and sustainable … Continue reading →

The Promise of Seawater Desalination in Algeria: Perspectives

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Algeria is one of the countries most exposed to water stress in the world. Classified as arid and semi-arid, it relies heavily on limited freshwater resources, with overexploited aquifers and dams often at critical levels during recurrent droughts. In response to this reality, the Algerian government has made seawater desalination a major strategic solution to secure potable water supply while alleviating pressure on natural freshwater resources. This approach goes beyond merely meeting human needs: it also potentially contributes to the preservation of terrestrial, marine, and freshwater ecosystems, in line with the objectives of the Kunming-Montreal Global Biodiversity Framework adopted in … Continue reading →

Impact of Urban Trees and Forests on Greenhouse Gas Emissions

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The fight against climate change has placed urban trees and forests at the heart of mitigation and adaptation strategies, to the point that tree planting is often perceived as a simple, visible, and widely accepted solution for reducing greenhouse gas emissions. In many countries, urban greening programs are expanding, with tree-lined streets, boulevards, and public spaces, while large-scale reforestation and forest restoration initiatives are prominently featured in Nationally Determined Contributions (NDCs) under the United Nations Framework Convention on Climate Change (UNFCCC). This situation raises a central question: does planting trees along streets genuinely contribute to reducing greenhouse gas emissions, or … Continue reading →

Water and Gender: A Strategic Lever for Sustainable Water Security

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World Water Day, celebrated every year on 22 March under the auspices of the United Nations, provides a unique opportunity to draw international attention to the vital importance of freshwater and to the persistent challenges related to its access, management, and sustainability. Since its inception, this observance has highlighted an annual theme addressing emerging priorities and structural challenges in the global water sector. In 2026, the chosen theme, “Water and Gender,” explicitly recognizes the close link between water management, sanitation, and gender inequalities, underscoring that the global water crisis is also a social, economic, and human crisis [1]. Although water … Continue reading →

Carbon Tax: The Missing Link Between Climate Ambition and Real Action

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At a time when climate change has emerged as one of the major determinants of economic, social, and geopolitical trajectories in the 21st century, the question is no longer whether action is needed, but how to act effectively, credibly, and sustainably. Nationally Determined Contributions (NDCs), the operational pillars of the Paris Agreement, embody this collective commitment to keeping the rise in global average temperature well below 2 °C, with efforts to limit it to 1.5 °C [1]. Yet, despite the proliferation of pledges, a persistent gap remains between declared ambitions and actual global emission trajectories, which continue to rise at a pace … Continue reading →

Energy Transition in Algeria: Concrete Levers to Move from Ambition to Action

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Algeria stands at a critical energy crossroads. Long known as one of Africa’s leading producers and exporters of hydrocarbons, the country is now attempting to balance the twin imperatives of maintaining economic stability from oil and gas revenues while accelerating a shift to a cleaner, more diversified energy system. With global pressure to decarbonize mounting and domestic energy demand rising rapidly, Algeria’s energy transition is no longer just a vision, it is becoming a necessary strategic priority. But turning ambition into tangible results requires a careful blend of policy frameworks, incentives, partnerships, and effective implementation. Algeria’s renewable energy potential is … Continue reading →

Can Treated Wastewater Help Algeria Overcome Water Scarcity?

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Water scarcity is among the most critical environmental and socio-economic challenges confronting Algeria. Located largely within arid and semi-arid climatic zones, the country experiences highly variable rainfall, frequent droughts, and limited renewable freshwater resources. Per capita renewable water availability in Algeria is estimated at around 404 m³/year, placing the country well below the internationally recognized water scarcity threshold of 1,000 m³/year [1]. Climate change projections indicate further reductions in precipitation, rising temperatures, and increased evapotranspiration, all of which are expected to intensify water stress in the coming decades [2]. In this context, the search for alternative and non-conventional water resources … Continue reading →

Why Delaying Climate Investment Today Will Cost the MENA Region Far More Tomorrow

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Climate change is no longer a distant or abstract risk. Across the Middle East and North Africa, its costs are already visible in mounting heat stress, water scarcity, food system pressures, infrastructure damage, and rising economic vulnerability. These impacts are not projections for the end of the century; they are current realities shaping development trajectories, public budgets, and social stability. The central question facing policymakers is therefore no longer whether climate change will be costly, but whether societies choose to pay through strategic investment today or through escalating losses tomorrow. Scientific and economic evidence converges on a clear conclusion : … Continue reading →

Restoring the El Harrach River: A Strategy for Environmental, Urban, and Social Renewal

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The El Harrach River, which flows through some of the most densely populated areas of Algiers, has for several decades become a symbol of the environmental challenges faced by rapidly urbanizing coastal cities. The foul odors that recur regularly are not only a nuisance for residents: they reflect a deep ecological imbalance, chronic pollution, and a deterioration of quality of life. Understanding the origins of these odors and proposing sustainable solutions requires an integrated analysis of the hydraulic, social, urban, industrial, and biological pressures exerted on this watercourse. The Degradation of El Harrach River For years, a significant share of … Continue reading →

Membrane Innovation: Transforming Water Security in Arid Regions

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Membrane innovation has emerged today as one of the most decisive technological levers for arid countries facing water scarcity, degradation of natural resources, and the rapidly increasing water demand for drinking, agricultural, and industrial water. At the heart of this silent revolution, membranes, whether reverse osmosis, nanofiltration, ultrafiltration, forward osmosis, or emerging processes such as biomembranes and graphene-based membranes, have transformed the way dry nations produce, recycle, and secure their water supply. Far from being a simple technical tool, they have become a major geopolitical, economic, and environmental instrument. In the context of accelerated climate change, where extreme droughts are … Continue reading →

Sahara Nature-Based Solutions: Algeria’s Ancestral Water Systems for Climate Resilience and Sustainability

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Nature‑based solutions (NBS) have emerged as a critical strategy for sustainable water resource management, especially in arid and semi‑arid regions where water scarcity is amplified by increasingly erratic rainfall, more frequent extreme weather events, and progressive ecosystem degradation. Algeria, which spans from the Mediterranean littoral to the vast expanses of the Sahara Desert, is endowed with a rich heritage of traditional hydraulic techniques adapted over centuries to the region’s harsh climate [1]. Long before modern hydraulic infrastructures, these techniques leveraged a deep understanding of local hydrology and integrated human settlements within the natural cycles, enabling a remarkable resilience to climatic … Continue reading →