The goal of this project unit is development of solutions for the improvement of energy systems and environmental monitoring systems in smart cities. The aim is to make cities as much energy efficient and sustainable as possible in resource management by protecting the environment and maintaining the quality of life of citizens, relying on the collected data through the core platform of a smart city. Sustainable management of natural resources (Smart Environment) is achieved through introduction of new technological solutions. This is particularly featured in energy consumption, waste management and administration, smart lighting, and construction or renovation of facilities. The project holder is Hrvoje Požar Energy Institute (HPEI), and the partners are Elektrokovina Plus, Apsolon, SmartIS and Hrvatski Telekom (Croatian Telecom).