Looking for alternative sources of energy to generate electricity has been a hot topic for society for a very long time. The need to replace current energy resources such as fuel, oil, and gas is increasing, and the replacement comes from energy obtained from the wind, sun, and sea waves. In many cases, valuable raw materials can be obtained in addition to energy production, while having a significant environmental effect simultaneously.
The shortage of energy and raw material resources in many countries stimulates the growth of interest in all potential sources of energy – solar, wind, wave, tidal – has lead to accelerating the demand for oil and gas, shale gas, as well as the expansion of the areas for the cultivation of technical crops for biofuels. Classical energy resources like oil, gas and coal are serious polluters of the natural environment. Especially harmful is the release of carbon dioxide and sulfur oxides during the exploitation of these resources.
A significant energy raw material potential of non-traditional resources lies in the waters and bottom of the Black Sea, which is a natural geobiotechnological reactor, capable of producing a variety of energy raw resources.
This paper discusses the use of hydrogen sulfide available in the Black Sea waters to produce energy and useful industrial products and proposes the respective. The technology also has an ecological effect in terms of the purification of the hydrogen sulfide pool. The paper also discusses some technologies for the separation of hydrogen sulfide to hydrogen and sulfur. An estimation of the heat value of hydrogen sulfide in the water of the Black Sea is also presented.

Gauging stations of meteorological networks generally record rainfall on a daily basis. However, sub-daily rainfall observations are required for modelling flood control structures, or urban drainage systems. In this respect, determination of temporal distribution of daily rainfall, and estimation of standard duration of rainfall are significant in hydrological studies. Although sub-daily rainfall gauges are present at meteorological networks, especially in the developing countries, their number is very low compared to the gauges that record daily rainfall.
This study aims at developing a method for estimating temporal distribution of maximum daily rainfall, and hence for generating maximum rainfall envelope curves. For this purpose, the standard duration of rainfall was examined. Among various regression methods, it was determined that the temporal distribution of 24-hour rainfall successfully fits the logarithmic model. The logarithmic model’s regression coefficients (named a and b) were then linked to the geographic and meteorological characteristics of the gauging stations. The developed model was applied to 47 stations located at two distinct geographical regions: the Marmara Sea Region and Eastern Black Sea Region, Turkey. Various statistical criteria were used to test the method's accuracy, and the proposed model provided successful results. For instance, the RMSE values of the regression coefficients a and b in Marmara Regions are 0.004 and 0.027. On the other hand, RMSE values are 0.007 and 0.02 for Eastern Black Sea Region.

‘The special military operation’ conducted by the Russian Federation, including the ‘anti-terrorist operation’ in the Black and Azov Seas carried out by its Black Sea Fleet, meets the definition of aggression, which, in addition to violating the UN Charter, also violates the provisions of UNCLOS (Article 301) and the San Remo Manual (general provisions, first three sections). The unilateral announcement (through a navigational warning) of an ‘anti-terrorist operation’, and in fact a sea blockade of Ukrainian ports, is contrary to the content of UNCLOS (freedom of navigation) and does not meet the requirements for methods of fighting at sea (sea blockade, zones - San Remo Manual).
The missile attacks on civilian and protected objects located on the territory of the Ukrainian state, carried out by ships and aircraft of the Black Sea Fleet, as well as artillery and missiles shelling of coastal towns, constitute a gross violation (war crime) of the international humanitarian law of armed conflicts (San Remo Manual). On contrary, the use of unmanned surface vehicles (drones) by the Ukrainian side in the arak on the Sevastopol base is in accordance with the provisions of the Manual (means of warfare at sea). Particular attention in the discussed armed conflict deserves art. 35 (c) UNCLOS relating to the Turkish Straits, which allows Turkey (based on the Montreaux Convention) to significantly influence the strategic and operational situation in the Black Sea by denying the use of the straits to warships (Turkey closed them to warships all flags). The voting procedure for informal members of the UN Security Council should be considered ineffective, which in the discussed case, when the aggressor is a state – a permanent member of the Security Council makes it difficult to apply measures provided for by international law against it and forces the use of ad hoc solutions, such as ‘grain corridors’.