Groundwater quality deterioration has attracted world-wide concerns due to its importance for human
water supply. Although more and more studies have shown that human activities and climate are
changing the groundwater status, an investigation on how different groundwater heavy metals respond
to human activity modes (e.g. mining, waste disposal, agriculture, sewage effluent and complex activity)
in a varying climate has been lacking. Here, for each of six heavy metals (i.e. Fe, Zn, Mn, Pb, Cd and Cu) in
groundwater,