An effect of humid climate on micro structure and chemical component of natural composite (Boehmeria nivea-Albizia falcata) based wind turbine bladeS. Sudarsono, P. Purwanto and Johny W SudarsonoE3S Web Conf., 31 (2018) 01005DOI: https://doi.org/10.1051/e3sconf/20183101005