"In order to assess the effect of “overuse” in natural parks, roadside soil and dusts were collected from Kamikochi, Chubu Sangaku National Park (Kamikochi) to Matsumoto City, Nagano Prefecture, Japan. Also, the concentrations of As, Sb, Hg and 5 other heavy metals (Ni, Cu, Zn, Cd, Pb) were measured." (Quoted from paper)