Currently, the spread of micro- and nanoplastics in the food chain and the environment has become a relevant and social issue. They enter the human body mainly through food, water and drinks packaged in various plastic materials, bottles or containers. It has been established that most urban water sources are contaminated with microplastics due to wastewater. The main objective of the article was to study the awareness of microplastic sources, exposure levels and potential health risks associated with microplastic contamination of food and water by surveying a heterogeneous audience of Internet users. The preventive focus of the survey included: 1) holding an action at the medical faculty of KRSU “Day without plastic”; 2) development, publication and distribution of an information leaflet in the Internet community on the key sources of microplastics in the daily human diet. The test group consisted of 502 Internet users. The author's questionnaire included 26 questions: personal data (5 questions), the size of microplastics, sources of information, an assessment of the risk factors for microplastics entering the body, its content in food and water and the impact on human health (a list of 16 diseases associated with microplastics is provided). Statistical processing of the obtained results was carried out using SPSS version 28.0.1 software. Questionnaires of 502 respondents aged 14–50 years were obtained through an online survey from October 2023 to January 2024 using Google forms. The demographic structure reflected the predominance of female representatives - 52.4%, men accounted for 47.6%. In terms of education level, students dominated among the subjects, incomplete higher education (67.3%), then secondary (14.8%), higher (9.9%) and primary education (8.8%). Most of the respondents lived in the city (80.3%), compared to rural areas (19.7%). Since the survey involved young people, 49.8% of respondents correctly answered the question that microplastics are small particles measuring 5 microns. 50.2% of respondents answered incorrectly, indicating sizes of 10 and 15 microns. Respondents noted that microplastics are most often found in bottled water (29.5%), tea bags (17.3%), natural water (10.3%), fish (8.1%), salt (6.3%), seafood (5.5%) and honey (4.5%). All of the above were noted by 29.5% of respondents. Most respondents to the question: which vegetables are most often contaminated with microplastics, answered that none (38.5%), followed by root vegetables (30.4%), onions (13.1%), cabbage (9.7%) and legumes (8.3%). Among the presented sample - the correct answer is - root crops are most susceptible to contamination. The results of the survey show that in everyday life 45.8% of respondents most often used plastic bags (55.7%), food packaging (18.7%), then cosmetics and hygiene products (17.4%), toys (5.9%) and cutlery (2.3%). Living in a “plastic world”, Internet users somehow do not notice it, to the question of how often the respondents use plastic products, 64.7% of them answered that every day, 26.7% - sometimes, 8.6% — rarely. As the results of the survey showed, most often Internet users received information about the harm of microplastics from social networks 26.5%, Google search engine — 20.7%, scientific articles — 18.9%, news — 17.1%, while communicating with friends, family — 5.5%. At the same time, 11.3% of respondents were not interested in the problem. When comparing the assessment of awareness of the direct and indirect impact of plastic on human health during plastic production and consumer use of plastics, they were aware (46.0% and 37.1%, respectively), slightly aware (31.9% and 37.8%) and did not know (22.1% and 25.1%). The risk that plastic pollution poses to wildlife, as well as to human health, well-being and prosperity, was assessed by respondents as average. 34.6% of respondents were in favor of actively reducing the use of plastic products. 33.7% of survey participants are still at the level of awareness of the problem and attempts to reduce plastic consumption. 31.7% find it difficult to answer, since they do not see an alternative. When asked about awareness of the impact of microplastics (the silent killer) on the development of 16 specific diseases, respondents were most aware of: digestive diseases, allergies, chronic inflammation, respiratory problems, cancer and reproductive problems.

As the population continues to increase, the demand for food has never been greater, placing immense pressure on the sustainable management of land and water resources [...]

This paper aims to analyze the scientific evolution and research trends concerning the water–energy–food (WEF) nexus, as well as its development within scientific databases. To achieve this, a bibliometric analysis has been conducted using publications sourced from Scopus and Web of science databases. This study examined key aspects such as primary journals, prominent authors, affiliated institutions, countries of origin, subject areas, and notable keywords. Furthermore, there is a dedicated section that delves into research and innovation gaps within publications related to the WEF nexus. Results reveal that research on the WEF nexus has experienced exponential growth over the past decade, with the majority of publications emerging between 2017 and 2023. The United States leads in this field, with engineering and environmental science being the predominant research categories, with Spain and Italy being the prominent countries in Europe. The WEF nexus concept in the agriculture sector is notably underdeveloped, particularly in its ties with the Sustainable Development Goals and the science–policy–society interface. The study stresses the importance of integrating health considerations into the WEF Nexus to understand the interconnections and their implications on public health, thereby enriching the Nexus approach with a critical dimension of human well-being. This situation underscores the urgent need to create a nexus community that bridges science and practice, and to incorporate this specialized discipline into university curricula. | Peer Reviewed | Postprint (published version)

SDG 17 underscores the pivotal and interconnected role of water, including its energy implications, in addressing challenges related to human well-being and sustainable development. Solar water pumps (SWPs) offer an important technological innovation exemplifying this water–energy–food–society nexus. As a comparatively new and eco-friendly approach to irrigation, SWPs have the potential to substantially benefit millions of smallholder farmers in sub-Saharan Africa (SSA). With costs for solar products steadily reducing, the small-scale SWP market is expected to grow in sales and expand into new territories. Overall, the region’s groundwater resources are known to be greatly underutilized and hence enable greater SWP adoption. This study assesses the possible risks to groundwater resources from SWP expansion to the year 2030. The current market environment is extremely heterogeneous across regions and countries. It is conservatively estimated that up to 10,000 units are sold each year, with the strongest markets found in East Africa. Around 100,000 SWP units are estimated to be in operation. For projected rates of annual growth spanning from 6% to 18%, along with intentionally high estimates of groundwater pumping, the upper limit on the quantity of available groundwater pumped by small SWP development to 2030 would vary from 0.4% to 0.6% at the SSA scale. Values in the regions vary from a low of <0.1% for Central Africa through to a high of 1.6%–2.1% for Southern Africa. Specific countries may generally support additional SWPs ranging from tens of thousands up to millions of units without negatively impacting on groundwater availability. Countries characterized by greater recharge and lower current groundwater use can accommodate greater numbers of SWP systems. Short-term threats to the availability of groundwater are assessed to be low over the short and medium terms. Over the long term, risks to groundwater may be greater than evaluated in this study should SWP growth rates exceed the projected range or if improvements in technology allow for stronger, small-capacity pumps to flood the market. To address long-term groundwater management challenges, key action areas have been defined that recognize the diverse conditions across the regions.

The geographical mismatch between water availability and demand further exacerbates the challenge of the water-energy-food nexus in China. This study characterizes competing water uses for crops and energy to reveal their resulting impacts on regional inequality by integrating the modified Gini coefficient and unbalanced index with respect to water scarcity and water surplus. From 2000–2019, China’s food production decreased by 2.3 % in the blue water footprint (ranging from −90.3 % to 71.7 % for specific provinces), while the energy sector increased by 111.9 % (varying from −69.9 % to 692.4 %). The energy sector showed greater inequality in blue water consumption verses available water, with the Gini coefficient ranged from 0.43 to 0.62, while the food-water nexus maintained a relatively stable value of approximately 0.35. Spatially, there was consistent water scarcity inequality in the north and water surplus inequality in the south for both the food-water and the energy-water nexus. Overall, the energy-water nexus exhibited larger variations in provincial inequalities. This divergent evolving inequality was primarily caused by a combination of factors that included resource endowments, regional economic disparities, and government interventions. These findings can inform policy makers towards optimizing the management of water-energy-food resources.

China’s agricultural sector has long realized innovation to meet burgeoning food demand, yet often innovation has occurred without concurrent consideration of trade-offs on blue water security. We contend that food security and blue water security should be given equal priority if sustainable production and consumption policies are to be defined. Here, we quantify the interplay between blue water and food security in China from 1990 to 2020 using blue water footprint (BWF) and blue water boundary as lenses. We find that national agri-food BWF has grown over time, being only 4 % below the sustainability boundary in 2020, and with the number of provinces with unsustainable system states increasing from nine in 1990s to 17 in 2010s. While blue water security and minimum food security have been achieved since 2012, the food consumption BWF has surpassed national food production and the BWF boundary by 32 % and 26 % in 2020, respectively. Assuming trends continue ceteris paribus, we project that China’s BWF will transgress the sustainability boundary by 2025. Even so, with appropriate intervention in production, supply chains, and consumption guidelines, the food demand/water supply conundrum could be equitable and sustainable, notwithstanding higher food consumption in 2030. This study clearly addressed the contradictions potential balancing between blue water and food security in China at the national scale, and we articulate a simple, scalable approach for nations facing water scarcity to deconstruct drivers of, and develop alternative futures for, sustainable water and food security.

The connections between universal rights to water supply, energy security, and food supply stand out as a challenge that requires project evaluation models that can capture the complex dynamics and interdependencies of these resources. This study proposes the elaboration of a nexus evaluation model (NEM) for projects related to the water–energy–food nexus (WEFN) from the perspective of sustainability, Industry 4.0, and the Sustainable Development Goals (SDGs). The model considers the three dimensions of sustainability—economic, environmental, and social; the three structuring factors of Industry 4.0—physical, biological, and digital; and the 17 SDGs proposed by the United Nations. A Design Science Research (DSR) approach was adopted in which the design and development of the model, and demonstration and evaluation phases, were supported by a group of experts. The model was applied to three different projects focused on sustainable technological innovation in energy and agriculture, with the results presented in the RGB color scale represented numerically as a number from 0 to 255. The results demonstrated that, in the relationship between nexus and sustainability, the projects presented scores between 162 and 217 for the environmental dimension, between 158 and 202 for the economic dimension and between 170 and 212 for the social dimension. In the nexus and Industry 4.0 relationship, the projects obtained scores ranging from 9 to 94 in the biological factor, from 13 to 141 in the digital factor, and from 13 to 141 in the physical factor. In the nexus and SDG relationship, scores ranged from 214 to 244 for water, from 195 to 255 for energy, and from 30 to 255 for food. These results from the model were consistent with the reality of the projects being evaluated, demonstrating a greater alignment of the projects with the dimensions of sustainability and the SDGs than with the factors of Industry 4.0. The proposal of the model contributes to broaden the understanding of how projects related to the nexus can be evaluated considering multiple contemporary dimensions.