ICEER 2021: Developing the World in 2021 with clean and safe energy

The World pandemic situation that started in 2020 brought important limitations to live events. In spite of the fast response provided by the scientific community, with researchers from all over the World committed to the development of vaccines to prevent the dissemination and effects of the corona virus, in 2021 it was not yet possible to organize the 8th International Conference on Energy and Environment Research (ICEER) under live mode. Therefore, the ICEER 2021 occurred online for the second consecutive year, from 13–16 September 2021. The Authors, Participants and the Conference organization understood how important it is to discuss matters related to Energy and the Environment Research, as it was demonstrated by the huge changes introduced by travel and work limitations. Not only the energy consumption was affected during the pandemic, but also the environment was positively impacted by the reduction of human individual travel, both for working and for amusement purposes. These facts highlighted even more the importance of the development and use of energy sources and systems that are reliable, affordable and, above all, environment friendly, towards Sustainable Development, which motivated the theme adopted for the current edition of ICEER 2021: “Developing the World in 2021 with clean and safe energy”. The ICEER 2021 recovered some participants who preferred the live version but were committed not to give up on their research in these important topics, and the full three working days demonstrated the resilience of this community. This editorial paper summarizes the ICEER 2021, briefly reporting the main conclusions and the most impacting sessions, presentations and interventions that allowed to strengthen the interaction among experts and young researchers in the energy and environment field