Food insecurity creates serious ethical, economic, and stability problems in all countries of the world, resulting in a need for its research. Each country seeks to ensure the highest degree of self-sufficiency in meeting the food needs by its own food production. However, the production of a sufficient quantity of food, and in particular its adequate structure, is not always fully realized. Therefore, ensuring food security has become an issue of primary strategic importance. Given that all the countries of the former Yugoslavia are relatively new countries undergoing a difficult period of transition, and that there are no local studies on food security, it remains to be examined how food- secure these countries are today and what factors affect their food security. The survey covered all countries of the former Yugoslavia: Republic of Serbia, Federation of Bosnia and Herzegovina, Republic of Montenegro, Republic of Croatia, Republic of Slovenia and Northern Macedonia. The survey data were taken from the FAOSTAT database, World Bank, as well as the national statistics of the countries of the former Yugoslavia, and hierarchical regression analysis was used. The results of the research showed that there is a statistically significant influence on the level of food security of all independent factors: general level of economic development, population growth, foreign trade, investments in agriculture. Of all the countries of the former Yugoslavia, Slovenia has emerged as the most nutritionally secure country, while the lowest level of food security has been observed in Bosnia and Herzegovina.

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Given the fact that in the professional literature on marketing, and especially in the segment of green (environmental) marketing, much more research is done and written about B2C markets, this paper is an attempt to explore procurement motives and behaviour of business customers during the complex purchasing process, on the example of several important thermotechnical devices, on the B2B market in Vojvodina. The research aims to collect relevant data from business customers through direct interviews regarding the impact of environmental performance on the procurement of gas boilers, heat pumps and air conditioners in order to obtain quality and reliable information based on the process, that is, conducted the descriptive statistical analysis, which will enable a better understanding of this complex issue. To collect qualitative data, the method of the unstructured deep interview was used. The results confirmed the research hypotheses and indicated the necessity of green marketing in current business conditions. It is indisputable that soon only organisations focused on green marketing and green marketing channels, that is to say, those which are focused on creating their own optimal relationship between their production, distribution and/or sales process, and environmental protection, will be able to gain a competitive advantage in dynamic business markets and achieve maximum satisfaction of environmentally demanding customers, and thus, in fact, at the same time give their full contribution to the sustainable development of the entire community.

Today, there is a trend towards a healthy lifestyle and a healthy diet. Cereals are considered the healthiest food because of their properties. They contain a good ratio of carbohydrates, unsaturated fatty acids, vitamins, proteins, minerals and plant fibers that are necessary for human nutrition. Therefore, the production and trade of cereals in the world tend to grow significantly. The aim of the paper is to identify the demographic characteristics of consumers that influence consumer decision when buying cereal products. The empirical research was conducted on a sample of 201 respondents from the territory of the Republic of Serbia through a questionnaire, which was made for research purposes. Through the discovery of consumer preferences, there is an opportunity to help producers of cereal products in Serbia to offer products that will meet the requirements of consumers.