RETRACTED: Basing the fuel saving and environmental performance of solar air heater collectorsMuxammadrafiq Toxirov, Mirsoli Uzbekov, Bekzod Boynazarov, Javlonbek Madaminov, Feruza Nasretdinova and Zuhriddin HamidjonovE3S Web Conf., 538 (2024) 01021DOI: https://doi.org/10.1051/e3sconf/202453801021