Nowadays photovoltaic trade in Poland is growing rapidly due to contemporary challenges in sustainable energy. The first Polish photovoltaic firms were established in the second decade of XXI century. It was the answer of looking for new innovative energy sources including solar energy. It was necessary to change the structure of energy sources in Poland mainly based on carbon and oil & gas. The aim of this article was the identification and assessment the key opportunities and barriers to photovoltaic industry enterprises in Poland in the context of technology entrepreneurship under conditions of information asymmetry. The paper was prepared based on the results of qualitative research using the case study method. A comparative analysis was performed based on results of a study of four purposefully selected enterprises. All of them are SMEs. The research was done in 2021. The case study method allowed for comparing the analysed enterprises in pairs, which is discussed more extensively further on in the text. The research performed will lead to conclusions and recommendations for the photovoltaic sector enterprises in Poland which will allow them to act more effectively and efficiently in conditions of competing on the global market. This paper contains the characteristics of photovoltaic trade in Poland, its macro and micro environment, the opportunities and threats of this trade and key strengths and weaknesses of characterized photovoltaic enterprises in Poland. Finally, the conclusion and recommendations of discussed Polish photovoltaic trade firms in future are evaluated.

Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

The article explains the need to ensure the sustainability of the existing ecosystem in the context of steady regional development. Criteria for sustainable regional development that involves the preservation and full reproduction of existing ecosystems for future generations are considered. These criteria gave the possibility to assess regional sustainable development and determine the adequate system of indicators that were tested according to the statistical data of Poland. The proposed model for evaluating the state of sustainable ecological and economic development in Poland is based on the definition of its criteria and statistical analysis of the dynamics of relevant indicators and the relationships between them. With the help of this model formulating recommendations for improving the ecological and economic condition of territories based on their clustering becomes possible. The result of the study is the rating of the regions according to the specified criteria, based on multifactor generalization.

The purpose of this article is to present the result of research on the determination of the carbon footprint that results from the execution of a selected group of transactions in an ERP system - Microsoft Dynamics 365 Business Central. This article is a part of article series which aim is to verify research hypothesis that management information systems i.e. ERP operating within the cloud generate less carbon footprint than those installed on local servers. Experiment was carried out using CodeCarbon Python package, which is used to estimate the carbon footprint generated by the computer as part of the executed process. The research can be distinguished by the following steps conducting a literature analysis, which made it possible to define the concept of the carbon footprint, its genesis and a description of the study carried out with its results. The result presents carbon footprint for digital interaction involving the capture of data from an ERP system (experi-mental transaction) was much lower than collated transactions i.e., sending email. Secondly car-bon footprint does not have an unambiguous definition in science.