Atmosphere:
● “Temporal Changes in Ozone Concentrations and Their Impact on Vegetation”
by Stanislav Juráň, John Grace and Otmar Urban
Atmosphere 2021, 12(1), 82; https://doi.org/10.3390/atmos12010082

● “The Development of a Hybrid Wavelet-ARIMA-LSTM Model for Precipitation Amounts and Drought Analysis”
by Xianghua Wu, Jieqin Zhou, Huaying Yu, Duanyang Liu, Kang Xie, Yiqi Chen, Jingbiao Hu, Haiyan Sun and Fengjuan Xing
Atmosphere 2021, 12(1), 74; https://doi.org/10.3390/atmos12010074

● “Atmospheric Dynamics and Numerical Simulations of Six Frontal Dust Storms in the Middle East Region”
by Nasim Hossein Hamzeh, Sara Karami, Dimitris G. Kaskaoutis, Ina Tegen, Mohamad Moradi and Christian Opp
Atmosphere 2021, 12(1), 125; https://doi.org/10.3390/atmos12010125

Clean Technolgies:
● “Bio-Hydrogen Production from Wastewater: A Comparative Study of Low Energy Intensive Production Processes”
by A K M Khabirul Islam, Patrick S. M. Dunlop, Neil J. Hewitt, Rose Lenihan and Caterina Brandoni
Clean Technol. 2021, 3(1), 156-182; https://doi.org/10.3390/cleantechnol3010010

● “Kolbe Electrolysis for the Conversion of Carboxylic Acids to Valuable Products—A Process Design Study”
by Daniel Klüh, Wolfgang Waldmüller and Matthias Gaderer
Clean Technol. 2021, 3(1), 1-18; https://doi.org/10.3390/cleantechnol3010001

Climate:
● “Hydroclimatic Variability in the Bilate Watershed, Ethiopia”
by Yoseph Arba Orke and Ming-Hsu Li
Climate 2021, 9(6), 98; https://doi.org/10.3390/cli9060098

● “Temperature and Precipitation Extremes over the Iberian Peninsula under Climate Change Scenarios: A Review”
by Susana C. Pereira, David Carvalho and Alfredo Rocha
Climate 2021, 9(9), 139; https://doi.org/10.3390/cli9090139

Diversity:
● “Origins of Six Species of Butterflies Migrating through Northeastern Mexico: New Insights from Stable Isotope (δ²H) Analyses and a Call for Documenting Butterfly Migrations”
by Keith A. Hobson, Jackson W. Kusack and Blanca X. Mora-Alvarez
Diversity 2021, 13(3), 102; https://doi.org/10.3390/d13030102

● “Why Is the Alpine Flora Comparatively Robust against Climatic Warming?”
by Christian Körner and Erika Hiltbrunner
Diversity 2021, 13(8), 383; https://doi.org/10.3390/d13080383

● “Mires in Europe—Regional Diversity, Condition and Protection”
by Franziska Tanneberger, Asbjørn Moen, Alexandra Barthelmes, Edward Lewis, Lera Miles, Andrey Sirin, Cosima Tegetmeyer and Hans Joosten
Diversity 2021, 13(8), 381; https://doi.org/10.3390/d13080381

● “The Role of Small Lowland Patches of Exotic Forests as Refuges of Rare Endemic Azorean Arthropods”
by Noelline Tsafack, Simone Fattorini, Mário Boieiro, François Rigal, Alejandra Ros-Prieto, Maria Teresa Ferreira and Paulo A. V. Borges
Diversity 2021, 13(9), 443; https://doi.org/10.3390/d13090443

Energies:
● “Bifacial Photovoltaics 2021: Status, Opportunities and Challenges”
by Radovan Kopecek and Joris Libal
Energies 2021, 14(8), 2076; https://doi.org/10.3390/en14082076

● “A Scalable Real-Time Non-Intrusive Load Monitoring System for the Estimation of Household Appliance Power Consumption”
by Christos Athanasiadis, Dimitrios Doukas, Theofilos Papadopoulos and Antonios Chrysopoulos
Energies 2021, 14(3), 767; https://doi.org/10.3390/en14030767

● “Do Environment-Related Policy Instruments and Technologies Facilitate Renewable Energy Generation? Exploring the Contextual Evidence from Developed Economies”
by Umer Shahzad, Magdalena Radulescu, Syed Rahim, Cem Isik, Zahid Yousaf and Stefan Alexandru Ionescu
Energies 2021, 14(3), 690; https://doi.org/10.3390/en14030690

● “The Beneficial Effect of the Addition of Fly Ash on Reduction of the Size of Microcracks in the ITZ of Concrete Composites under Dynamic Loading”
by Grzegorz Ludwik Golewski
Energies 2021, 14(3), 668; https://doi.org/10.3390/en14030668

● “Confronting Energy Poverty in Europe: A Research and Policy Agenda”
by Stefan Bouzarovski, Harriet Thomso and Marine Cornelis
Energies 2021, 14(4), 858; https://doi.org/10.3390/en14040858

● “Impact of the Lockdown during the COVID-19 Pandemic on Electricity Use by Residential Users”
by Sławomir Bielecki, Tadeusz Skoczkowski, Lidia Sobczak, Janusz Buchoski and Łukasz Maciąg, Piotr Dukat
Energies 2021, 14(4), 980; https://doi.org/10.3390/en14040980

● “Review on Deep Neural Networks Applied to Low-Frequency NILM”
by Patrick Huber, Alberto Calatroni, Andreas Rumsch and Andrew Paice
Energies 2021, 14(9), 2390; https://doi.org/10.3390/en14092390

● “Deep-Learning Forecasting Method for Electric Power Load via Attention-Based Encoder-Decoder with Bayesian Optimization”
by Xue-Bo Jin, Wei-Zhen Zheng, Jian-Lei Kong, Xiao-Yi Wang, Yu-Ting Bai, Ting-Li Su and Seng Lin
Energies 2021, 14(6), 1596; https://doi.org/10.3390/en14061596

● “Critical Review of Flywheel Energy Storage System”
by Abdul Ghani Olabi, Tabbi Wilberforce, Mohammad Ali Abdelkareem and Mohamad Ramadan
Energies 2021, 14(8), 2159; https://doi.org/10.3390/en14082159

● “Review of Multilevel Inverters for PV Energy System Applications”
by Ali Bughneda, Mohamed Salem, Anna Richelli, Dahaman Ishak and Salah Alatai
Energies 2021, 14(6), 1585; https://doi.org/10.3390/en14061585

● “CdTe-Based Thin Film Solar Cells: Past, Present and Future”
by Alessandro Romeo and Elisa Artegiani
Energies 2021, 14(6), 1684; https://doi.org/10.3390/en14061684

● “Assessing the Level of Energy and Climate Sustainability in the European Union Countries in the Context of the European Green Deal Strategy and Agenda 2030”
by Magdalena Tutak, Jarosław Brodny and Peter Bindzár
Energies 2021, 14(6), 1767; https://doi.org/10.3390/en14061767

● “Integrated Approach for Wastewater Treatment and Biofuel Production in Microalgae Biorefineries”
by Sanjeet Mehariya, Rahul Kumar Goswami, Pradeep Verma, Roberto Lavecchia and Antonio Zuorro
Energies 2021, 14(8), 2282; https://doi.org/10.3390/en14082282

● “Methane Cracking for Hydrogen Production: A Review of Catalytic and Molten Media Pyrolysis”
by Malek Msheik, Sylvain Rodat and Stéphane Abanades
Energies 2021, 14(11), 3107; https://doi.org/10.3390/en14113107

● “Economic Considerations on Nutrient Utilization in Wastewater Management”
by Josef Maroušek and Anna Maroušková
Energies 2021, 14(12), 3468; https://doi.org/10.3390/en14123468

● “Recent Progress of Organic Photovoltaics with Efficiency over 17%”
by Xuelin Wang, Qianqian Sun, Jinhua Gao, Jian Wang, Chunyu Xu, Xiaoling Ma and Fujun Zhang
Energies 2021, 14(14), 4200; https://doi.org/10.3390/en14144200

● “A Review of DC Microgrid Energy Management Systems Dedicated to Residential Applications”
by Sadaqat Ali, Zhixue Zheng, Michel Aillerie, Jean-Paul Sawicki, Marie-Cécile Péra and Daniel Hissel
Energies 2021, 14(14), 4308; https://doi.org/10.3390/en14144308

● “Nexus between Financial Development, Renewable Energy Consumption, Technological Innovations and CO2 Emissions: The Case of India”
by Muhammad Qayyum, Minhaj Ali, Mir Muhammad Nizamani, Shijie Li, Yuyuan Yu and Atif Jahanger
Energies 2021, 14(15), 4505; https://doi.org/10.3390/en14154505

● “Comprehensive Review on Fuel Cell Technology for Stationary Applications as Sustainable and Efficient Poly-Generation Energy Systems”
by Viviana Cigolotti, Matteo Genovese amd Petronilla Fragiacomo
Energies 2021, 14(16), 4963; https://doi.org/10.3390/en14164963

● “Do Perceived Risk, Perception of Self-Efficacy, and Openness to Technology Matter for Solar PV Adoption? An Application of the Extended Theory of Planned Behavior”
by Arifa Tanveer, Shihong Zeng, Muhammad Irfan and Rui Peng
Energies 2021, 14(16), 5008; https://doi.org/10.3390/en14165008

Environments:
● “Sources of Light Density Microplastic Related to Two Agricultural Practices: The Use of Compost and Plastic Mulch”
by Benjamin van Schothorst, Nicolas Beriot, Esperanza Huerta Lwanga and Violette Geissen
Environments 2021, 8(4), 36; https://doi.org/10.3390/environments8040036

● “Study of the Urban Heat Island (UHI) Using Remote Sensing Data/Techniques: A Systematic Review”
by Cátia Rodrigues de Almeida, Ana Cláudia Teodoro and Artur Gonçalves
Environments 2021, 8(10), 105; https://doi.org/10.3390/environments8100105

Forests:
● “Xylem Phenology and Growth Response of European Beech, Silver Fir and Scots Pine along an Elevational Gradient during the Extreme Drought Year 2018”
by Elena Larysch, Dominik Florian Stangler, Mona Nazari, Thomas Seifert and Hans-Peter Kahle
Forests 2021, 12(1), 75; https://doi.org/10.3390/f12010075

● “Recent Advances in Unmanned Aerial Vehicles Forest Remote Sensing—A Systematic Review. Part II: Research Applications”
by Riccardo Dainelli, Piero Toscano, Salvatore Filippo Di Gennaro and Alessandro Matese
Forests 2021, 12(4), 397; https://doi.org/10.3390/f12040397

● “Global Change and Forest Disturbances in the Mediterranean Basin: Breakthroughs, Knowledge Gaps, and Recommendations”
by Josep Peñuelas and Jordi Sardans
Forests 2021, 12(5), 603; https://doi.org/10.3390/f12050603

● “Emerald Ash Borer Approaches the Borders of the European Union and Kazakhstan and Is Confirmed to Infest European Ash”
by Mark G. Volkovitsh, Andrzej O. Bieńkowski and Marina J. Orlova-Bienkowskaja
Forests 2021, 12(6), 691; https://doi.org/10.3390/f12060691

Hydrology:
● “A New Physically-Based Spatially-Distributed Groundwater Flow Module for SWAT+”
by Ryan T. Bailey, Katrin Bieger, Jeffrey G. Arnold and David D. Bosch
Hydrology 2020, 7(4), 75; https://doi.org/10.3390/hydrology7040075

Minerals:
● “Common Problems and Pitfalls in Fluid Inclusion Study: A Review and Discussion”
by Guoxiang Chi, Larryn W. Diamond , Huanzhang Lu, Jianqing Lai and Haixia Chu
Minerals 2021, 11(1), 7; https://doi.org/10.3390/min11010007

● “A Study of Thermal Stability of Hydroxyapatite”
by Natalia V. Bulina, Svetlana V. Makarova , Sergey G. Baev, Alexander A. Matvienko , Konstantin B. Gerasimov, Olga A. Logutenko and Vladimir S. Bystrov
Minerals 2021, 11(12), 1310; https://doi.org/10.3390/min11121310

Quaternary:
● “Comparison of Climate Model Simulations of the Younger Dryas Cold Event”
by Hans Renssen
Quaternary 2020, 3(4), 29; https://doi.org/10.3390/quat3040029

● “The Late Quaternary Evolution of the Upper Reaches of Fluvial Systems in the Southern East European Plain”
by Andrey Panin, Olga Borisova, Evgeny Konstantinov, Yury Belyaev, Ekaterina Eremenko, Andrey Zakharov and Aleksey Sidorchuk
Quaternary 2020, 3(4), 31; https://doi.org/10.3390/quat3040031

● “Disentangling Domestication from Food Production Systems in the Neotropics”
by Charles R. Clement, Alejandro Casas, Fabiola Alexandra Parra-Rondinel, Carolina Levis, Nivaldo Peroni, Natalia Hanazaki, Laura Cortés-Zárraga, Selene Rangel-Landa, Rubana Palhares Alves, Maria Julia Ferreira et al.
Quaternary 2021, 4(1), 4; https://doi.org/10.3390/quat4010004

● “Dating of the Lower Pleistocene Vertebrate Site of Tsiotra Vryssi (Mygdonia Basin, Greece): Biochronology, Magnetostratigraphy, and Cosmogenic Radionuclides”
by George E. Konidaris, Dimitris S. Kostopoulos, Matteo Maron, Mirjam Schaller, Todd A. Ehlers, Elina Aidona, Mattia Marini, Vangelis Tourloukis, Giovanni Muttoni, George D. Koufos et al. Quaternary 2021, 4(1), 1; https://doi.org/10.3390/quat4010001

● “Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations”
by Eric Capo, Charline Giguet-Covex, Alexandra Rouillard, Kevin Nota, Peter D. Heintzman, Aurèle Vuillemin, Daniel Ariztegui, Fabien Arnaud, Simon Belle, Stefan Bertilsson et al.
Quaternary 2021, 4(1), 6; https://doi.org/10.3390/quat4010006

Remote Sensing:
● “A Machine Learning-Based Approach for Surface Soil Moisture Estimations with Google Earth Engine”
by Felix Greifeneder, Claudia Notarnicola and Wolfgang Wagner
Remote Sens. 2021, 13(11), 2099; https://doi.org/10.3390/rs13112099

● “Estimating Canopy Density Parameters Time-Series for Winter Wheat Using UAS Mounted LiDAR”
by Jordan Steven Bates, Carsten Montzka, Marius Schmidt and François Jonard
Remote Sens. 2021, 13(4), 710; https://doi.org/10.3390/rs13040710

● “Spatial-Spectral Transformer for Hyperspectral Image Classification”
by Xin He, Yushi Chen and Zhouhan Lin
Remote Sens. 2021, 13(3), 498; https://doi.org/10.3390/rs13030498

● “Leveraging TLS as a Calibration and Validation Tool for MLS and ULS Mapping of Savanna Structure and Biomass at Landscape-Scales”
by Shaun R. Levick, Tim Whiteside, David A. Loewensteiner, Mitchel Rudge and Renee Bartolo
Remote Sens. 2021, 13(2), 257; https://doi.org/10.3390/rs13020257

● “Applying RGB- and Thermal-Based Vegetation Indices from UAVs for High-Throughput Field Phenotyping of Drought Tolerance in Forage Grasses”
by Tom De Swaef, Wouter H. Maes, Jonas Aper, Joost Baert, Mathias Cougnon, Dirk Reheul, Kathy Steppe, Isabel Roldán-Ruiz and Peter Lootens
Remote Sens. 2021, 13(1), 147; https://doi.org/10.3390/rs13010147

● “Mapping Daily Evapotranspiration at Field Scale Using the Harmonized Landsat and Sentinel-2 Dataset, with Sharpened VIIRS as a Sentinel-2 Thermal Proxy”
by Jie Xue, Martha C. Anderson, Feng Gao, Christopher Hain, Yun Yang, Kyle R. Knipper, William P. Kustas and Yang Yang
Remote Sens. 2021, 13(17), 3420; https://doi.org/10.3390/rs13173420

● “Machine Learning Classification of Mediterranean Forest Habitats in Google Earth Engine Based on Seasonal Sentinel-2 Time-Series and Input Image Composition Optimisation”
by Salvatore Praticò, Francesco Solano, Salvatore Di Fazio and Giuseppe Modica
Remote Sens. 2021, 13(4), 586; https://doi.org/10.3390/rs13040586

● “SAR Ship Detection Dataset (SSDD): Official Release and Comprehensive Data Analysis”
by Tianwen Zhang, Xiaoling Zhang, Jianwei Li, Xiaowo Xu, Baoyou Wang, Xu Zhan, Yanqin Xu, Xiao Ke, Tianjiao Zeng, Hao Su et al.
Remote Sens. 2021, 13(18), 3690; https://doi.org/10.3390/rs13183690

● “UAVs for Vegetation Monitoring: Overview and Recent Scientific Contributions”
by Ana I. de Castro, Yeyin Shi, Joe Mari Maja and Jose M. Peña
Remote Sens. 2021, 13(11), 2139; https://doi.org/10.3390/rs13112139

● “A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices”
by Mercedes Solla, Vega Pérez-Gracia and Simona Fontul
Remote Sens. 2021, 13(4), 672; https://doi.org/10.3390/rs13040672

Safety:
● “Comparative Analyses of Parameters Influencing Children Pedestrian Behavior in Conflict Zones of Urban Intersections”
by Aleksandra Deluka-Tibljaš, Irena Ištoka Otkovi and Tiziana Campisi, Sanja Šurdonja
Safety 2021, 7(1), 5; https://doi.org/10.3390/safety7010005

● “Physical Ergonomic Improvement and Safe Design of an Assembly Workstation through Collaborative Robotics”
by Ana Colim, Carlos Faria, João Cunha, João Oliveira, Nuno Sousa and Luís A. Rocha
Safety 2021, 7(1), 14; https://doi.org/10.3390/safety7010014

● “Integrated IEW-TOPSIS and Fire Dynamics Simulation for Agent-Based Evacuation Modeling in Industrial Safety”
by Wattana Chanthakhot and Kasin Ransikarbum
Safety 2021, 7(2), 47; https://doi.org/10.3390/safety7020047

Sustainability:
● “15-Minute City: Decomposing the New Urban Planning Eutopia”
by Georgia Pozoukidou and Zoi Chatziyiannaki
Sustainability 2021, 13(2), 928; https://doi.org/10.3390/su13020928

● “Impact of Climate Change on Agriculture and Its Mitigation Strategies: A Review”
by Gurdeep Singh Malhi, Manpreet Kaur and Prashant Kaushik
Sustainability 2021, 13(3), 1318; https://doi.org/10.3390/su13031318

● “Assessing Health Damages from Improper Disposal of Solid Waste in Metropolitan Islamabad–Rawalpindi, Pakistan”
by Tanzila Akmal and Faisal Jamil
Sustainability 2021, 13(5), 2717; https://doi.org/10.3390/su13052717

● “The Unsustainable Use of Sand: Reporting on a Global Problem”
by Walter Leal Filho, Julian Hunt, Alexandros Lingos, Johannes Platje, Lara Werncke Vieira, Markus Will and Marius Dan Gavriletea
Sustainability 2021, 13(6), 3356; https://doi.org/10.3390/su13063356

Urban Science:
● “Evaluating the Accuracy of Gridded Population Estimates in Slums: A Case Study in Nigeria and Kenya”
by Dana R. Thomson, Andrea E. Gaughan, Forrest R. Stevens, Gregory Yetman, Peter Elias and Robert Chen
Urban Sci. 2021, 5(2), 48; https://doi.org/10.3390/urbansci5020048

Water:
● “Start-Up of Anammox SBR from Non-Specific Inoculum and Process Acceleration Methods by Hydrazine”
by Ivar Zekker, Oleg Artemchuk, Ergo Rikmann, Kelvin Ohimai, Gourav Dhar Bhowmick, Makarand Madhao Ghangrekar, Juris Burlakovs and Taavo Tenno
Water 2021, 13(3), 350; https://doi.org/10.3390/w13030350

● “Occurrence and Fate of Emerging Pollutants in Water Environment and Options for Their Removal”
by Ionela Cătălina Vasilachi, Dana Mihaela Asiminicesei, Daniela Ionela Fertu and Maria Gavrilescu
Water 2021, 13(2), 181; https://doi.org/10.3390/w13020181

● “Strategies for Improving Optimal Positioning of Quality Sensors in Urban Drainage Systems for Non-Conservative Contaminants”
by Mariacrocetta Sambito and Gabriele Freni
Water 2021, 13(7), 934; https://doi.org/10.3390/w13070934