This proceedings book contains the full papers of the 10th edition of the International Conference on Energy and Environment Research, ICEER 2023, that took place in Madrid, Spain during October 7–9, 2023. ICEER 2023 is a joint organization of the School of Engineering (ISEP) of the Polytechnic of Porto (P.Porto) and the SCIEI, with collaboration of the Dipartimento di Ingegneria of the Università degli studi "Roma Tre", CIETI and LEPABE research groups. This book includes all the well prepared full papers presented at ICEER 2023.