![]() It is also found that the most rising trend in the number of IoT projects currently is as expected in smart cities, connected health and smart supply chain segments, with an annual rise over 30% in the EU and USA. Other significant potentials are connected buildings, connected cars and energy segments ( Forbes, 2018), but lower than the first mentioned fields. If recent projects in IoT technologies are being analysed than most of them are in the field of smart cities and industrial IoT. General market structure of IoT technologies ( Nižetić et al., 2019). , where it is evident that the majority of the market is focused on smart cities and industrial IoT. The general present market structure of IoT technologies is presented in Fig. 1 The expected investments in IoT technologies are also high with expectations being over 120 ♱0 9 USD by 2021, with a compound annual growth rate of about 7.3%, ( Forbes, 2018). The rise of IoT technologies is currently intense and according to projections for the next 10 years, over 125 ♱0 9 IoT devices are expected to be connected, ( Techradar, 2019). Therefore, the relevance and importance of IoT technologies in future terms are more than clear and should play an important role. Some potential application areas in IoT technologies are still unknown or insufficiently clear on how to approach them which is an evident indication that more intense research activity should be conducted in this challenging field towards new and important potential benefits for society. Internet of things (IoT) based technologies bring a completely new perspective on the further progress of various fields, such as for instance in engineering, ( Zaidan and Zaidan, 2020), agriculture ( Farooq et al., 2020), or medicine ( Salagare and Prasad, 2020), and in other fields that have not been explored yet. ![]() On the other side, each development utilizes limited resources leaving behind different environmental footprints, ( Li et al., 2020a), especially different kinds of pollutants, ( Zeinalnezhad et al., 2020). In fact, IoT technologies are nowadays assumed to be one of the key pillars of the fourth industrial revolution due to significant potential in innovations and useful benefits for the population. ![]() Digitalization has allowed ‘‘smart’’ ( Zheng et al., 2019) to become the epicentre of already ongoing technological developments. With rising technological developments in society, new possibilities have occurred and that could simplify our daily life and provide more efficient services or production processes. The main outcomes of the review introductory article contributed to the better understanding of current technological progress in IoT application areas as well as the environmental implications linked with the increased application of IoT products. latest advancements in the further fields: (i) IoT technologies in Sustainable Energy and Environment, (ii) IoT enabled Smart City, (iii) E-health – Ambient assisted living systems (iv) IoT technologies in Transportation and Low Carbon Products. Four main topical areas were discussed in the herein editorial, i.e. Various application areas of IoT technologies were discussed as well as the progress made. The research presented and discussed at the SpliTech2019 conference helped to understand the complex and intertwined effects of IoT technologies on societies and their potential effects on sustainability in general. The focus of the conference was directed towards key conference tracks such as Smart City, Energy/Environment, e-Health and Engineering Modelling. The SpliTech2019 conference was a valuable event that successfully linked different engineering professions, industrial experts and finally researchers from academia. This review editorial is partially directed on the research contributions presented at the 4th International Conference on Smart and Sustainable Technologies held in Split and Bol, Croatia, in 2019 (SpliTech 2019) as well as on recent findings from literature. Significant research efforts are needed in the previous sense to carefully investigate the pros and cons of IoT technologies. Sustainability has become a key issue for population where the dynamic development of IoT technologies is bringing different useful benefits, but this fast development must be carefully monitored and evaluated from an environmental point of view to limit the presence of harmful impacts and ensure the smart utilization of limited global resources. ![]() The main goal of IoT technologies is to simplify processes in different fields, to ensure a better efficiency of systems (technologies or specific processes) and finally to improve life quality. The rapid development and implementation of smart and IoT (Internet of Things) based technologies have allowed for various possibilities in technological advancements for different aspects of life.
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