With the goal of enhancing the quality of the environment, urban green infrastructure (UGI) is an essential element in sustainable cities, and nature-based solutions (NBS) are being carried out as new infrastructure solutions that increase the resilience of cities. In this research, the method of theoretical analysis and the content analysis as the basic fact-gathering technique was applied to answer to following questions: What are the hindrances and bottlenecks in implementing NBS? Are the current decision-making mechanisms helping NBS get in route to shape cities? Is there any binding policy in practice that promotes NBS? In Belgrade is planned Type 3 of the degree of intervention/level and engineering type—Creation and new ecosystem management in the classifications of intensive urban green space management; urban planning strategies; urban water management; ecological restoration of degraded terrestrial ecosystems; and restoration and creation of semi-natural water bodies and hydrographic networks. In the future, it is essential to implement policies and incentives on national, regional, and local scales that help encourage the usage of NBS in the development of urban infrastructure.

Based on the UNEP Food Waste Index Report 2021, approximately 931 million tons of food waste were generated in 2019, with nearly 570 million tons of that waste occurring in households. Hunger affects more than 800 million people worldwide. Furthermore, the non-consumption of food accounts for 8-10% of global greenhouse gas emissions. Therefore, food waste generation has significant environmental, societal, and economic consequences. The circular economy (CE) is an economic model that seeks to reduce waste and extend resource life. The purpose of this study is to examine and present the connections between the CE, the Sustainable Development Goals (SDGs), and food waste management. Food waste management is commonly regarded as an environmental issue. Still, it also offers vital economic and social benefits for sustainable development. The first section of the research looks at the function of food waste management in the transition to a circular economy. The second part of this study examines the SDGs in food waste management and circular economy. The findings revealed that the most significant connections and synergies between food waste management, circular economy practices, and SDG targets could be found in SDG 2 (Zero Hunger) and SDG 12 (Responsible Consumption and Production). Both goals have high scores for direct and indirect contributions.

Maximum limits for PAHs content in honey and bee products are not set. The objective of this study was to conduct a market survey of honey for the presence of PAH16 with the aim of detecting potential contamination and health risks for consumers. A total number of 61 honey samples produced in the territory of Serbia were examined. The content of PAH16 was measured using a gas chromatography-mass spectrometric method. Large values were found in some samples: 140.6 µg/kg for chrysene, 136.3 µg/kg for benzo[ghi]perylene, 120.1 µg/kg for benzo[a]pyrene, 87.2 µg/kg for benz[a]anthracene and 79.6 µg/kg for benzo[k]fluoranthene. It was established that 6.6% honey samples were not safe for human consumption because of high benzo[a]pyrene and PAH4 content, which greatly exceeded the maximum limits for all food categories. Considering that screening of honey obtained from the market does not allow accurate detection of the contamination origin requires further investigations to identify potential contamination sources.