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The development of areas of bio-economy, which replace fossil fuels with bioresources in production and the provision of services, is important in many countries. Therefore, in 2017, the government approved the Latvian Bioeconomy Strategy 2030, which provides for four key integrated groups and one complementary group of measures to implement this strategy. As five years have passed since the strategy was approved in Latvia, it is necessary to assess the progress of its implementation. Therefore, the aim of the pre...

In recent years, with the rise of a growing economic and technological interest in lithium mineral resources, there has been a parallel concern, on the part of some local populations and even national environmental groups, for a hypothetical contamination problem that this type of exploitations may cause on the quality of groundwater. Thus, the present study was based on an evaluation of an open-pit quarry, in the socalled Alijo quarry, located in the North of Portugal, in the parish of Canedo, Ribeira de Pena mun...

The purpose of the analysis is to identify prospects and opportunities for the development of the oil industry of Arab countries (including Saudi Arabia, the United Arab Emirates. Kuwait, Qatar. Oman, Iraq) as well as Iran, Venezuela, Russia and some others), in the difficult post-pandemic and political conditions of 2022. In our opinion, there is a strong influence on the oil industry of cyclical and structuralcyclical fluctuations of the world economy, along with the environmental policy of the OECD countries, l...

The evaluation of radioactivity levels was performed on milk samples collected biannually for a period of 10 years (2012-2021) from two Central Romanian counties, Sibiu and Alba. The radioactivity concentrations in milk samples originated from Sibiu varied from 0.028-0.001 Bq/L to 0.347-0.017 Bq/L, from 24.017-0.977 Bq/L to 65.403-6.281 Bq/L, from 0.090-0.010 Bq/L to 0.110-0.010 Bq/L, from 0.085 to 0.110 Bq/L, for gross alpha, gross beta, 137Cs and 90Sr, respectively. The radioactivity concentrations in milk sampl...

The purpose of this article is to assess the quality of soil and water environmental factors in some protected areas in Romania both to establish geochemical threshold values and to highlight anthropogenic pressures where they have been identified. The activities carried out are defined spatially and temporally so that the results obtained include seasonal variations and other influencing factors that have a variability on a temporal and spatial scale. Each protected area introduced in the study was well documente...

Public procurement is the acquisition of products and services needed for the public sector and involves significant public budget resources. Incorporating environmental requirements into public procurement promotes both the goals of sustainable development and the principles of the circular economy. Green public procurement practices are becoming increasingly important, not only in the world, but also in Latvia. Therefore, in 2017, the Latvian Bioeconomy Strategy 2030 was approved, which envisages the development...

For the period 2011-2021, 231 fish species from 18 families were established in protected area BG0000271 -Mandra-Poda-, 345 fish species from 7 families in protected area BG0001502 -Otmanli- and 169 species from 11 families in a protected area BG0000242 -Chengene skele Bay-. One hundred eighty-seven of the species were freshwater, 256 were typical marine fish species, and the other one hundred and fifteen were anadromous and brackish species. Protected species are Rhodeus amarus, Cobitis taenia, Chalcalburnus chal...

Both domestic and wild rabbits are susceptible to an increased number of parasites, however, only few are of economic importance. The aim of this study was to identify the endoparasite species present in domestic and wild leporidae from Caras-Severin county, between April 2021 and March 2022. A total of 157 leporids, 111 domestic rabbits (Oryctolagus cuniculus) and 46 wild rabbits (Lepus europaeus) were included in the study. The rabbits were grouped into three age categories: 4 months, 4 months - 1.6 years, 1.6 y...

In recent years, the development of resistance to various antibiotics frequently used in veterinary practice has been observed. The cause seems to be the excessive use of antibiotics without doing an antibiogram. The aim of this study was to investigate the antimicrobial effect of different garlic extracts on Salmonella strains isolated from dogs. The research was carried out on a number of 19 strains of Salmonella spp. isolated from fecal samples from dogs. Salmonella spp is a bacterium with zoonotic risk. Differ...

Ammonium nitrate used as fertilizer is classified, according to Orangebook, as a hazardous substance in Class 5 Division 1 (5.1), oxidizing substances. Although, under fire conditions, ammonium nitrate burns in certain situations, the transition from combustion to detonation can occur. Such accidents have occurred in several countries, with significant quantities, including in Romania. Such catastrophic scenarios can occur in the case of nitrogen-based chemical fertilizers, in which case the manufacturing recipe (...

The significance of organic plant growth stimulants, in the development of sustainable agriculture and increasing the fertility of degraded soils has sparked the interest of scientists and practitioners working in the field of agriculture in recent decades. On the world market, there are numerous plant growth biostimulants of various origins and compositions, as well as numerous research analyzing their impacts and roles. The study aimed to determine the novel biological activity of the new Georgian biostimulants ...

Biomass is extensively accepted as one of the main potential sources for sustainable and renewable generation of fuels, chemicals and other carbon-based materials. Many advantages are reported using biomass as an energy source, such as being a non-polluting alternative and its carbon neutrality. Numerous processes can be used to convert biomass, and namely the pyrolysis process is a renewable, economical, and efficient way to produce chemicals and/or energy. Therefore, pyrolysis is an available technology for biom...

The installation and maintenance of equipment intended for use in potentially explosive environments requires specific knowledge and qualifications for the personnel who commissions and subsequently maintain such equipment. When installing and maintaining electrical equipment, situations may arise which may in turn lead to an unacceptable level of risk with regarding to the activation of ignition sources of potentially explosive atmospheres in their immediate vicinity, due to the failure to comply the principles o...

By product is broadly understood as a product obtained in a usually industrial or biological process in addition to the main product for which the process is carried out. The main challenge addressed to humanity as well as productive ecosystems, regardless of the form of terrestrial or aquatic substrate, is to cope with the rapid rate of growth of the planet's population. The demographic growth of the planet must be in balance with the maintenance of the environment and also with climatic shifts. By-products are o...

Renewable energy plays a fundamental role for the Green Deal and for achieving carbon neutrality by 2050. EU Directive on renewable energy revised confirms the community block objective of obtaining 38-40% of energy from renewable sources by 2030, doubling the share of solar, wind and other renewables in Europe's energy mix by the end of the decade. The European Commission recommended that Romania increase the share of energy from renewable sources used for the year 2030 to at least 34% in a future analysis. Roman...

People hear about disasters that affect the whole world daily from various media sources. These disasters include natural disasters, disasters caused by mankind or a combination of the two. This includes the war that is happening in Ukraine. Many disasters can cause a fire to occur in buildings. With any fire in a building, a safe evacuation of people must be ensured. Thus, it is important to design buildings so that when people are evacuating, they are safe. Escape routes must ensure that all people can get to a ...

Surfactants produced by microorganisms, known as biosurfactants, have recently found wide application in the industry, from cosmetology to oil processing. Biosurfactants are more tolerant to extreme environmental conditions and less hazardous for the environment as compared with their chemical analogues. Despite on the fact that many biosurfactant producers have been recently isolated and described, the challenge to explore new producers still remains very urgent. In the present study, the isolates obtained from r...

The grass of the grasslands is the most accessible source of food for herbivores during a significant period of a year. The knowledge of the floristic composition of grasslands reflects the current state and is an essential element in determining the load of animals. This paper is a case study and aims to inventory the species participating in the grass cover near some localities in Western Romania. Vegetation surveys were made in March, June and the first quarter of October. The study method by which the vegetati...

The intensive development of remote sensing in the marine environment provides excellent bathymetric and substrate mapping opportunities on the southern Bulgarian Black Sea coast. The Bay of Chernomorets is a perfect opportunity to combine data from single-beam sonar, multi-beam sounding and drone imaging for the purpose of seabedforms and substrate mapping. This paper presents the second stages activity of the Project -Multidisciplinary study of Burgas Bay - MidBay. (Composition of a detailed digital model of the...

-he space-time distribution of earthquakes is of substantial importance for understanding the physics of the earthquake generation process. Earthquakes can be analyzed as a time series of events that result from the released strain in the earth's crust. The study of the space-time distribution of earthquakes using statistical methods reveals many of their characteristics. Sequences of seismic events affect both spatial and time distribution of earthquakes. It is necessary to know the statistical characteristics of...

Cryogenic energy storage (CES) is a large-scale energy storage technology that stores electricity in the form of liquefied gas at cryogenic temperatures. The CES system has three sub-processes, namely, charging or liquefaction, storage, discharging or power cycle. Because the main energy costs in this system are related to the liquefaction module, we will focus on the analysis of liquefaction processes. The present work aims at performing a comparative study between cycles commonly used for the liquefaction of air...

The paper presents issues regarding uncertainty involved in the test process to ignition of small components for intrinsically safe equipment. In the first part of the paper, the classification of explosion-protected equipment is presented. In power generation and also in other industrial areas, the incidence of flammable substances is a common factor. As a consequence of this, the risk of explosion may arise. On the other hand, installations located in areas endangered by the presence of flammable substances must...

Decarbonising the EU-s energy system is crucial to reach the 2030 climate objectives and the EU-s long-term strategy of achieving carbon neutrality by 2050. Based on these Green Deal goals and the current energy situation in Europe, it is highly important to focus on biofuel energy sources. Our research deals with the behaviour of households in the Czech Republic and changes in their consumption habits in the last decades. The main goal of this paper is to evaluate the development of the consumption of biofuels by...

The studies using (14C)-labeled tea (Tea Sinensis) biomass have demonstrated that tea biomass is degraded in red (Nitisols Ferralic) and brown forest (Humic Cambisols) soils. The application of manganese sludge and manganese sulfate (MnSO4) in these soils increases the mineralization in both soil taxa evidencing an active participation of Mn ions in the degradation of phenolic substances. When applying manganese sludge and/or MnSO4 to the experimental samples, most of 14CO2 is released during the first 60 days as ...

The main objective of the paper is to analyze and evaluate what are the manifestations and impacts of suburbanization in the hinterland of the city of Presov. The first manifestations of suburbanization started in 1996 and continue even nowadays. This process brings several consequences, economic, social, demographic, environmental, etc. When looking at migration flows, Presov has shown a long-term decline in population. The municipalities located in its hinterland show an increase in population. In this paper we ...

The article justifies the perception of green public procurement as a set of policies, actions and relationships with environmental contexts that emerge and shape the market for green products and services. The purpose of this study is to analyze the state of the green public procurement market in Bulgaria, to clarify the difficulties that contracting authorities (or assignors) most often encounter in the use of environmentally friendly criteria in public procurement, as well as to identify the main risks and chal...

The paper aims to analyse the main air pollutants considered responsible for most premature deaths and illnesses: particulate matter, nitrogen dioxide, sulphur dioxide, and ground-level ozone. The research methodology used is based on the analysis and synthesis of information from the scientific literature on air pollution, identification of sources of air pollutants and their implications for human health. The principal research method used in the paper is content analysis. The importance of this publication is t...

This paper presents the degree of noise pollution in Braila. Braila is a city located in southeastern Romania. For this purpose, sound level measurements were performed in various important locations in this city. The monitoring took place between November 2019 and June 2020. The measurements were performed using a professional digital acoustic sound level meter that can record sound values between 30dB-130dB. The sound level meter works with two frequency filters: -A- and -C-. -A- filter responds in the same way ...

Infrastructure projects can be the source of multiple environmental impacts, such as roadkill, habitat loss, and habitat fragmentation. Specialty studies have shown that almost 194 million birds and 29 million mammals may be killed each year on European roads. In our country, the dense network of national roads often causes roadkill events, with the following possible impact forms: reduction of wildlife species populations, damage to population fitness, changes in the spatial distribution and migration routes. At ...

By developing this paper, we wanted to identify the opportunities for the growth and development of the Faget area in Romania, based on the specific resources available. Geographical location, natural and anthropogenic sites, as well as existing accommodation structures provide this area a high tourist potential. Natural landscapes, recreational areas, hunting, fishing, historical monuments, wooden churches, and natural resources are the most important attractions of the Faget area that can be valorised. The autho...

The paper aims to address what types of protection can be applied to galvanic elements and batteries that are used in potentially explosive atmospheres. In order to keep electrical equipment in operation in environments with potentially explosive atmospheres under harsh conditions, including galvanic elements and batteries, a certain type of protection must be applied for safe operation. The types of protection applied to galvanic elements and batteries are made in accordance with EN 60079-0 and in compliance with...

Food security is one of the most important issues that needs to be addressed in order to achieve UN Sustainable Development Goals. Currently multiple technologies are used in conventional agricultural practices, including application of artificial intelligence and GIS. However, the technologies are rarely considered in sustainable farming practices. Organic agriculture, although gaining traction in recent times, mostly relies on traditional, rather than technologically advanced approaches. There are, however, mult...

Over the last 10 years, the amount of packaging waste in Latvia has increased by almost 40%. The statistical report on the types of packaging waste generated and recovery rates in the Republic of Latvia in 2018, in accordance with European Commission Decision 2005/270/EC, shows that the total amount of packaging waste was 257 350 tonnes in 2018, and plastic packaging made up 17%. Plastics are relatively light (comparing with wood or glass materials), it means that the volume of such waste is large and increasing e...

Meat and bone meal (MBM) is considered animal waste and can no longer be used in agriculture since the onset of the disease called spongiform encephalopathy in cattle. This waste is burned and then dumped in landfills, which causes unwanted emissions to the environment. This is a real problem nowadays and we must find environmentally friendly solutions must be identified to eliminate this waste by energy recovery. For these reasons, a lot of processes have been developed to recovery the MBM, which are environmenta...

The purpose of this research work is to provide an integrated techno-economic analysis and an optimal design of hybrid electricity power supply systems that incorporate autonomy and power supply stability with minimum cost. Three isolated Islands, namely, Lesvos, Karpathos and Astypalea, in the Aegean Sea, Greece, have been identified as the appropriate sites for the performance assessment of the off-grid hybrid power systems, due to the abundant renewable energy potential in the Islands, in conjunction with the r...

Monitoring of atmospheric air in the city of Kazan was performed based on average annual concentrations of the Air Pollution Observation Stations (APOS) of three administrations: The Federal Budgetary Healthcare Institution -Center of Hygiene and Epidemiology in RT (Tatarstan)- (FBHI -H&E Center in RT-), Ministry of Environment and Natural Resources of RT (MEPNR of RT) and Federal State Budgetary Institution -Territorial Administration for Hydrometeorological and Environmental Monitoring in RT- (FSBI -TAHEM in RT-...

In the context of the issues discussed within, it can be noted that the main objective of this paper is related to the presentation of the European Union as one of the leading producers of green cars, whose goal is to reduce harmful emissions to protect the environment. Based on the plinth thus built, the opinion of the Bulgarian consumer on the presented European initiative should be clarified. The main objective thus launched requires the consistent clarification of the following tasks: to present the European U...

The aim of this study is to identify opportunities for the development of the bioeconomy in Latvia, assessing its role in the development of the agricultural sector. Nowadays, the development and sustainability of natural resources are of great importance. The bioeconomy can be considered as one of the oldest sectors of the economy, which life sciences and biotechnology can transform into one of the most modern sectors of the economy. From a number of perspectives, one of Latvia's development opportunities is the ...

Sustainability within a region is achieved by providing a variety of services regarding the tourism products within an area. The Giurgeu basin in order to be able to sustain its values, needs to offer a wide variety of services that attract and increase the overnight stay of tourists. The services needed to be diversified with the beginning of the pandemic season of 2020 - 2022. These services existed before, but during the pandemic period, where the tourism suffered the most, it became evident that the entreprene...

The Interest in recycling of materials to reduce the CO2 emissions and reduce the energy consumption has inspirited us to investigate the influence of ferrous metallurgical solid waste material namely "slag" on the performance of traditional Portland cement composites. The scrap material was mechanically treated by crushing followed by ball milling and classification. The mechanically treated slag was mixed with Portland cement without any modification. The mix was casted into the desired moulds and allowed to sol...

The alternative way to solve the greenhouse gas emission problems is carbon dioxide (CO2) capture and utilization. CO2 hydrogenation is one of the routes to obtain valuable chemicals and fuels such as methanol. The effect of indium (In) promoter on catalytic system Cu/Zn/SBA-15 has been studied. 1%In/Cu/ZnO/SBA15 and 6%In/Cu/ZnO/SBA15 catalysts have been synthesized by impregnation method and compared with Cu/Zn/SBA-15 catalyst (the content of Cu 30 wt.% and the content of Zn 1.4 wt.%). All catalysts have been cha...

As rising temperature, climate changes and growing greenhouse gas emissions are viewed as inevitable consequences of burning fossil fuels, energy consumers in different sectors of national economy are expected to contribute to the optimization of their energy consumption. Therefore, farmers need to develop sustainable means of agricultural production that are able to meet strict requirements for higher efficiency. The study aims to fill the gap in the literature by exploring the consumption of energy per livestock...

The energy community, as a new mode of citizen participation in the European renewable energy market, highlights the close connection between energy decentralisation, territorial development, and the crucial role of local authorities in doing so. In the context of territorial development and keeping within the ongoing decentralisation processes, participation and sustainability is particularly important. Also, the very idea of promoting community energy, leads to the affirmation of an innovative system of energy g...

Energy raw materials that play a crucial role in the economic development of Poland are: crude oil, natural gas as well as lignite and hard coal. The history of mining of the aforementioned raw materials have a complex and long tradition. Historically, Poland was a pioneer and a European leader in crude oil mining which now has only marginal importance in domestic demand. Currently, we are also a witnesses of a decline of hard coal mining which was the basis of the country's energy security for many years. Poland ...

The threat of climate change and its negative consequences is currently a very serious and immediate problem. Undoubtedly, the most striking manifestation of climate change is global warming, both on land and in the oceans. Increasing the average air temperature adversely affects natural ecosystems, which find it very difficult to adapt to this change. Significant consequence of climate change is also the fundamental impact on water resources. In this work we focused on the influence of climatic conditions on the ...

In the restoration of the historical and geographical conditions of today's Bulgarian lands, historical sources and documents of different origin, character and purpose come into use. The lack of sufficiently complete and accurate information about the development and dynamics of coastal archaeological landscapes in the narrative source material enhances the importance of medieval and renaissance maps of the Black Sea basin, which are an invaluable source of information. The combination of this information, togeth...

Climate change is one of the biggest global challenges. As a result of human activity, large amounts of greenhouse gases are released into the atmosphere, contributing to global warming. Carbon dioxide (CO2) is a major greenhouse gas, therefore, hydrogenation of CO2 to value-added chemicals and liquid fuels is of great importance for a sustainable future. It is well known that iron-based catalysts can demonstrate good activity in the hydrogenation of CO2. However, catalysts need to be improved to promote the forma...

Research will focus on investments for the development of the company. Transition to the circular economy is understood in many cases only as an unnecessary obstacle, not as the new business model. Production based on the linear model "take, make, dispose of" is not possible anymore based on decreased environmental quality. Increased production efficiency could help promote the company's prestige, gain tax allowances, create optimistic co-operation with the state, municipality, and maintain sustainability in terms...

Military resistant architecture (MRA) is a trend to protect civilians, settlements, the environment, and existing buildings from the strikes happening during the war. The development of military technologies and armaments brings with it the need to define new urban security solutions. In this case, it is very important to analyze the physical characteristics of the building and its surrounding, such as the tectonics and physical parameters of the building-s site. To secure the buildings from new, sixth-generation ...

In recent years, the geological service of Kazakhstan has been assigned the task of searching for sites where ores would meet modern industrial requirements. It has become a matter of re-evaluation of lead-zinc deposits and of identification among them of promising non-traditional commercially genetic types. One of these is the karst type, which has the following features: high lead and zinc content, compact ore deposits, effective ore enrichment, wide development in Kazakhstan of carbonate rocks with lead-zinc mi...