Developing countries will be home to 85% of the world’s population by 2030. Hence, it is important to ensure food security for them. This effort is not easy, as the number of undernourished people (NUP) in the world has increased. We investigated the impact of food and non-production factors on the NUP in developing countries. This study employed secondary data from 57 developing countries between 2002 and 2018. These countries come from three regions, namely Africa, Asia, and Latin America and the Caribbean. One-step and two-step generalized method of moments (sys-GMM) models were used to analyze the data. The findings showed that the food production index, cereal import dependency ratio, economic globalization index, and human capital index had different effects on the NUP in each region. The excellent news is that corruption control can help developing countries minimize their NUP. Based on the findings, we propose efforts to improve physical and economical food access and control corruption, and developing country governments and the international community must demonstrate a strong commitment to reducing the prevalence of undernourishment.

The stability of electricity service mainly depends on two main factors. One of them is the country’s power plant capacity and electricity imports. Another factor is the network that delivers electricity to consumers. Recently, consumer electricity production has appeared as a third factor due to the spread of renewable energies. The article focuses on the transformation of the structure of Hungary’s electricity sources between 2010 and 2020. We used the concentration indicator to examine the structure of export–import deliveries with neighboring countries. We also analyzed the centralization of Hungary’s electricity-generating units and the composition of their fuels. In this article, we examined the increasingly widespread renewable energies, which are replacing the traditional—mainly fossil fuel—energy carriers. The relationship between coal, natural gas, nuclear, solar, wind, water, and bioenergy, as well as net imports, were analyzed using a Pearson correlation matrix. This article concludes that renewable energies will cause further transformation in the future, both in the structure of export–import and power plants. In electricity imports, green power is increasingly preferred. Electricity from renewable sources will account for an increasing share of electricity production. In the future, electricity production based on non-renewables will move toward power plants with low carbon dioxide emissions. On the other hand, it is also moving in the direction of fast-reacting power plants due to weather-dependent renewables. Annual system load peaks will continue to increase year after year in the future, thereby posing additional challenges to electricity generation and the electricity grid.

Foreign direct investment (FDI) is one of the most important elements influencing countries' international economic integration. FDI establishes direct, consistent, and long-lasting interconnections between economies as well as encouraging innovative technology and know-how transmission across territories while allowing host economies to offer their goods more extensively on global markets. FDI is also a source of investment financing that creates the climate for appropriate policies. Aside from the obvious advantages for all economic sectors, attracting FDI in small and midsize enterprises (SMEs) has a variety of additional benefits. For example, an opportunity to participate in the global supply chain for parts and components; an opportunity not yet wholly established in most developing nations but is critical for industrialization and improving income distribution through job creation for low-skilled employees. This study compared the impact of FDI on the performance of SMEs in Vietnam to that of a group of ASEAN nations with comparable economic structures including Indonesia, Malaysia, and Thailand. The empirical evidence indicates that FDI has a negative effect on the performance of SMEs in the group of four ASEAN member countries while having a positive influence on Vietnamese SMEs.

The impact of climate change is increasingly evident in various domains today and is gaining prominence in scientific inquiries. Climate change also affects the utilisation of renewable energies. The article examines the effects of 21st-century climate change on the annual electric energy production of medium-sized photovoltaic module systems. The study bases its analysis on three possible scenarios: a pessimistic (RCP 8.5), a less pessimistic (RCP 4.5), and an optimistic (RCP 2.6) scenario. The applied Representative Concentration Pathways (RCP) scenarios were developed by the Intergovernmental Panel on Climate Change (IPCC) to enhance comparability in analyses related to climate change. Compared to older linear models, an innovation utilises a more flexible and multidirectional model. One of the article’s key findings is that, for all three examined settlements, the annual yield of the studied photovoltaic systems will surpass the levels of the base year 2010 by the middle and end of the century. Another significant outcome is that, under the three scenarios analysed, the ratio of annual performance variation to annual global radiation variation shows substantial differences by the middle and end of the century compared to the 2010 baseline. In the optimistic scenario, this ratio exceeds 1, whereas in the pessimistic and less pessimistic scenarios, it falls below 1. This ratio does not directly inform about the annual production—which increases in all cases—but rather about the changes in efficiency. These efficiency changes are influenced by the rise in annual average temperatures and the fluctuation in sunny hours yearly. The third finding reveals that under the climate change pessimistic scenario (RCP 8.5), the efficiency decrease is less adverse than in the less pessimistic scenario (RCP 4.5).

The utilization of renewable energy sources has an increasing role in the EU’s climate and energy policy. There are several reasons for increasing the use of renewable energy. The motives are the reduction of imported dependence on fossil fuels, mitigation of the adverse environmental impact of the energy sector and boosting of industrial development. The study provides a comprehensive overview on the structure and utilization of energy production of the Visegrad countries, focusing on the dependence on energy imports. The purpose of the article is to analyze the gross inland energy consumption of the Visegrad countries and to examine the relationship between renewables and non-renewable energy sources. In the course of the analysis, we tried to find out which non-renewable energy carrier is replaced by the renewables.