Is it safe to go backcountry hiking in the Tundra's of northwestern Russia, e.g. the Kola peninsula, such as the Khibin mountains? There is some heavy industry around there; can one safely go around, camp, drink from the rivers etc. as one would do in Scandinavia or the Alps, or should this rather be avoided? What about other risks that one doesn't need to worry (much) about in western or northern Europe?