Implementing energy transformation through the goal of the more extensive use of renewable energy sources is one of the key tasks on the road to slowing adverse climate change. The pace of this transformation is dependent on both the political decisions and social support for the implemented changes. The indicator of the aforementioned support is the Willingness to Pay for Renewable Energy Sources (WTP) declared by residents. The increase of the WTP value influences a more rapid and wider substitution of non-renewable energy sources with renewable energy sources. The goal of this paper is to analyze the determinants of the WTP indicator on the example of residents of Kraków and their perception of the actions aimed at reducing the level of environmental pollution. Research is based on a survey performed on a representative sample of 393 residents of Kraków, Poland. In the surveyed group of residents, the average monthly willingness to pay more for renewable energy was PLN 83.7, i.e. approx. USD 21.47. The WTP differs in a statistically significant manner depending on the type of housing in which the respondents reside. On average, the residents of detached houses or terraced housing declared the WTP value twice as high as the WTP value declared by the residents of apartment buildings or tenement houses.

The purpose of this publication is to briefly present selected issues, that have been the subject of the work of the International Maritime Publication in the last two years. For IMO this was a period when the organization had to face very serious consequences of the COVID-19 pandemic. It influenced not only the fate of thousands seafarers in this industry, but also the functioning of the Organization itself, forcing to adopt innovative and unprecedented solutions. Their effects are still clearly felt and have an impact on the current as well as future work. Authors would like to draw the attention, inter alia, on issues that have become pivotal in this difficult time and others that focus particularly on aspects related to seafarers’ rights, autonomous ships, fraudulent registration and fraudulent registries of ships, increasing safety in shipping, facilitating maritime trade and protection of maritime environment. Simultaneously, it is worth stressing out that the list of important issues presented in this paper is not exhaustive. The article also briefly presents the organizational structure of IMO.

Phytosociological studies carried out in the forests of Silesian Upland and Głubczyce Plateau during the years 1994-2000 showed a widespread distribution of Impatiens parv!flora. It ranges from coniferous and mixed forests to alder carrs, riverside carrs, oak-hornbeam phytocoenoses, and beechwood associations. The optimal conditions for Impatiens parviflora are those found in Ti/io-Carpinetum typicum. Nevertheless, the highest percentage cover of that species occurred in heavily degenerated communities which were the result of clear-felling and tree planting.

Geomechnical model testing has been widely applied as a kind of research technique in underground engineering problems. However, during the practical application process, due to the influence of many factors, the desired results cannot be obtained. In order to solve this problem, based on the measurement requirements of the model test, combined with FBG(Fiber Bragg Grating) sensor technology and traditional measurement methods, an FBG monitoring system, Micro-multi-point displacement test system, resistance strain test system and surrounding rock pressure monitoring system are developed. Applying the systems to a model test of the tunnel construction process, the displacement in advance laws of tunnel face, radial displacement distribution laws and surrounding rock pressure laws are obtained. Test results show that a multivariate information monitoring system has the advantage of high precision, stability and strong anti-jamming capability. It lays a solid foundation for the real-time data monitoring of the tunnel construction process model test.