In order to increase the quality of life on earth, smart technology plays a very vital role in the current period. The metropolitan areas improved rapidly as a result of which the standard of living has also been increased rapidly due to the innovative introduction of smart city concept. Digitalization and smart city projects added more value to increase the sustainability and ecological aspects to a very larger extend.

Energy efficient buildings are constructed to reduce the artificial energy sources and use natural energy to the utmost extend. Cutting edge technologies are used to reduce the energy consumption and provide a sustainable environment to live in. Construction of smart buildings and efficient transportation system helps in producing a greener environment with less pollution. Smart city concept balances the energy exchange by converting the electric energy into a final by product that needs minimal interventions.

Smart city is a concept in which all energies such as heat, electric, gas, water, and telecommunications are used in a very minimal extent. The amount of input and the output of all types of energies are controlled at each and every point of time to have a sustainable infrastructure. Urban, national, and international development of cities are all reliant on the consumption of energy. Increased energy consumption will also increase the emission of CO2 (Karthiga and Praveena 2022; Karthiga et al. 2022a, b) to a larger extent as a result of which the global temperature increases with a rapid change in climate all over the world (Karthiga and Kannan 2022). Increase in urbanization and population increase has made a challenging task to reduce the environmental issues and its impact (Karthiga and Kannan 2023; Karthiga et al. 2023a, b). Apart from that, rapid change in transportation systems increases the use of energy to a larger extent. Various research studies have been carried out to increase the sustainability aspects that use optimal energy for a sustainable greener environment. According to the recent studies from international energy agency in 2030 nearly, half of the transportation emissions will lead to the increase in the energy.

All physical system in the present world requires a need of certain amount of energy. Each and every matter present in the world has some energic or active field inbuild in it. Energy in general is nothing the capacity of the system to change from one form to another when there is thermal movement of photos or electrons. As shown in Fig. 1 smart technology is a concept that uses latest technologies in each and every aspect such as in medical, transportation, construction, and business. The purpose of this research presentation is to present an overview on the sustainable energy, development in each and every field of engineering. It also aims in bringing various scholars from different fields with different ideas and solutions for major environmental issues thus providing an eco-friendly environment to live in.

Fig. 1
figure 1

Smart technology for sustainable environment

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