Summary

Environmental science emerged from the fields of natural history and medicine during the Enlightenment. Today, it provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems. Environmental studies are incorporating more of the social sciences in order to understand human relationships, perceptions and policies towards the environment. This entry collection features information about design and technology for improving environmental quality in every aspect.

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Entries
Topic Review
Metal Oxide Nanocomposites for Environmental Photocatalysis
Metal oxide nanocomposites are multicomponent semiconductor materials of growing interest for environmental photocatalysis owing to their tunable structural, optical, and electronic properties. Among these materials, ZnO–CeO₂–TiO₂ ternary nanocomposites combine the distinctive characteristics of zinc oxide, cerium dioxide, and titanium dioxide, offering opportunities to modify phase composition, crystallinity, defect structures, and light absorption behavior. Their physicochemical properties are strongly influenced by synthesis conditions and subsequent thermal treatment. Co-precipitation provides a relatively simple and cost-effective approach for preparing ternary metal oxide nanocomposites. Calcination can further influence crystal growth, lattice imperfections, surface hydroxyl groups, and optical characteristics. Structural and spectroscopic techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and ultraviolet–visible spectroscopy, are essential for examining these changes and establishing relationships between material structure and optical response. Metal oxide nanocomposites have been investigated in the broader scientific literature for light-driven environmental applications, particularly the degradation of organic pollutants in aqueous systems. However, favorable structural and optical properties alone do not establish photocatalytic efficiency, which requires experimental evaluation under defined reaction conditions. This entry presents an overview of the synthesis, structural characteristics, optical behavior, and potential environmental applications of metal oxide nanocomposites, with particular emphasis on ZnO–CeO₂–TiO₂ systems. It also discusses the importance of thermal treatment, material characterization, and future investigations into photocatalytic activity, degradation kinetics, and catalyst stability for wastewater treatment applications.
  • 9
  • 27 Oct 2026
Topic Review
Environmental Health Hazards in Childcare Facilities
Environmental health hazards in childcare facilities are chemical, physical, and biological agents in the buildings, grounds, air, and water of early care and education (ECE) settings that can harm young children and staff. Common hazards include lead in paint, dust, soil, and drinking water; pesticides; formaldehyde and other indoor air pollutants; radon; mold and allergens; and contamination from a site’s past or neighboring land uses. Young children are more vulnerable to these exposures than adults and may spend up to ten hours a day in care. As a result, childcare settings have become an important focus for environmental public health practice, licensing, and inspection.
  • 7
  • 21 Oct 2026
Topic Review
Artificial Intelligence, Machine Learning, Climate, Space Science, Textile
This entry provides an overview of climate variability and forecasting using statistical, stochastic, and machine learning approaches. It focuses on time-series analysis, Markov chain models, long-memory processes, ARIMA/ARFIMA modelling, and the analysis of large-scale climate phenomena such as El Niño–Southern Oscillation (ENSO). It also explores solar activity and potential solar–terrestrial relationships with climate variability, highlighting modelling techniques, forecasting applications, methodological challenges, and future research directions. The entry aims to provide an accessible and scientifically grounded resource for researchers, students, and professionals in climate science, environmental statistics, and space science.
  • 17
  • 19 Oct 2026
Topic Review
Aquatic Nanotoxicity: Mechanistic Pathways and Sustainable Design
Engineered nanomaterials (ENMs) deployed for aquatic remediation present a fundamental ecotoxicological paradox: the nanoscale physicochemical properties driving efficient pollutant degradation—specifically high specific surface energy, tunable redox potentials, and unsaturated coordination sites—simultaneously induce severe cytotoxicity in non-target aquatic organisms. The mechanistic origins of aquatic nanotoxicity stem from interfacial electron transfer, thermodynamics of oxidative dissolution, and colloidal destabilization, which collectively initiate cellular damage via uncontrolled reactive oxygen species (ROS) generation and the endocytic "Trojan Horse" pathway. In natural waters, environmental transformations such as dissolved organic matter adsorption form a dynamic eco-corona, fundamentally altering colloidal stability, dissolution kinetics, and bioavailability. Resolving this duality requires transitioning from reactive post hoc risk assessments to a proactive Safe-and-Sustainable-by-Design (SSbD) framework, utilizing electronic band-gap engineering, heteroatom doping, and core-shell mesoporous architectures to systematically decouple remediation efficacy from ecological hazard.
  • 57
  • 15 Jul 2026
Topic Review
Ecological and Population Dynamics
Ecological determinants of avian population dynamics are essential for effective wildlife management and conservation. Black and grey francolins are classified as being of least concern by the IUCN and are an ecologically significant bird in the northern regions of Pakistan. Although habitat degradation and overhunting have adversely affected their populations, research on the population structure and habitat preferences of the Totali Game Reserve, Buner District, Pakistan, remains limited. The present study applied distance sampling via the line transect method to estimate population densities and the quadrat method to assess vegetation characteristics across three distinct habitats. A statistical analysis revealed significant variations in densities across the three habitat types—agricultural lands, agroforests, and pasturelands—with both species exhibiting distinct preferences for pastureland ecosystems. Seasonal trends indicated that autumn represented the peak period for the population, driven by post-breeding surges and optimal habitat conditions. Moreover, both species demonstrated a strong affinity for habitats dominated by specific plant species, including hopbush, raspberry, barberry, and blackberry, which provide a critical resource for food, foraging, nesting, and shelter. These findings highlight the ecological importance of pasturelands and specific vegetation types for supporting the survival of these species. Furthermore, conservation efforts should prioritize the preservation and restoration of pastureland ecosystems and incorporate rigorous monitoring programs to guide adaptive management strategies aimed at mitigating population declines.
  • 30
  • 28 Feb 2026
Topic Review
Innovative Treatment of Melnick-Needles Syndrome
The authors would like to present the reconstructive treatment of facial skeleton defects resulting from genetic abnormalities in the course of Melnick-Needles syndrome. Maxillomandibular osteotomy assisted by the use of individually designed mandibular ramus distractors was performed. The achieved treatment results, both functional and aesthetic were very good. The authors emphasize that such a method of improving the facial features and restoring the correct arrangement of the jawbones has not been performed so far.
  • 295
  • 28 Aug 2025
Topic Review
Influence of Nesting Habitat and Nest Emplacement
The black francolin (Francolinus francolinus, Phasianidae) is a ground-dwelling bird found across Eurasia, including Pakistan. Understanding its breeding ecology is essential for conservation. This study explores how nesting habitat and site selection affect breeding success in the Totali Game Reserve. Results show that wetlands, particularly bush-covered areas, provide better protection for nests, leading to higher survival rates. These findings help us improve habitat management strategies for the species. Additionally, human activities including bird translocations may influence genetic diversity, highlighting the need for conservation efforts.
  • 602
  • 16 May 2025
Topic Review
The Evolution of Artificial Intelligence
Artificial Intelligence (AI) has transitioned from a speculative concept to an integral part of modern life, influencing various sectors and redefining human interaction with technology. This article explores the historical development of AI, its current applications, and the ethical considerations accompanying its rapid advancement.
  • 761
  • 08 Apr 2025
Topic Review
A Mysterious Health Crisis in Aswan Governorate, Southern Egypt, September 2024
In September 2024, the Egyptian Health Ministry declared an Escherichia coli (E. coli) outbreak in the southern province of Aswan. The spread of an ambiguous illness erupted in the village of Abu Al-Rish Bahri, 20 kilometers north of Aswan, with hundreds of citizens arriving at the governorate’s local hospitals suffering from severe gastrointestinal infections. The authorities, however, did not trace the outbreak’s most common source nor determine whether it was food- or water-borne. The official explanations for the frequent cases and the reported fatalities were inconclusive. There was an evident lack of comprehensive documentation on the extent of the infection, the exposed population, the prevalence pattern of the pathogen, or the retrieved E. coli isolates. In addition, the Egyptian government denied any possible association between the contamination of drinking water and the recent Aswan crisis. Challenging the official narrative, this article proposes a scientific report based on featuring the status of E. coli infection in Egypt, highlighting the gaps in the announced outbreak claims and adapting water pollution as an alarming hypothesis for the peculiar Aswan disease.
  • 2.4K
  • 31 Mar 2025
Topic Review
Structural Design and Analysis of Wind Turbine
This thesis presents a comprehensive exploration into the design, modeling, and analysis of a wind turbine, employing a multidisciplinary approach to optimize its performance. The blade geometry was generated using QBlade software, a robust tool for blade design in wind turbine applications. The 3D model was then meticulously crafted using SolidWorks, integrating aerodynamic principles and structural considerations. The heart of this project lies in the utilization of SolidWorks Flow Simulation for a detailed analysis of the aerodynamic characteristics of the designed wind turbine. The simulation facilitated a thorough examination of airflow patterns, turbulence effects, and pressure distributions around the blades, offering valuable insights into the efficiency and energy-capturing potential of the turbine under various wind conditions.
  • 898
  • 02 Dec 2024
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