Prospects of environmentally safe use of renewable energy sources in the sustainable tourism development of the Carpathian region of UkraineOleh Mandryk, Nataliia Moskalchuk, Liudmyla Arkhypova, Mykola Prykhodko and Olena PobigunE3S Web Conf., 166 (2020) 04005DOI: https://doi.org/10.1051/e3sconf/202016604005