Assessing the heavy metal pollution level in Jiu Valley by bio-monitoring inferior plants – mossAndrei Szollosi-Moţa, Maria Prodan, Irina Vasilica Nălboc and Sonia Niculina ŞuvarMATEC Web Conf., 305 (2020) 00010DOI: https://doi.org/10.1051/matecconf/202030500010