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Heavy metal pollution remain a major challenge
Currently, in addition to focal pollution causes (radioactive materials, biological pollution, plant protection chemicals, etc.) heavy metals contamination by such chemicals as As, Pb, Cd, Hg, Cr emissions from increasing, industrial and mining activities are posing a major challenge for developing countries like Vietnam. Hazards stemming from heavy metals are increasingly threatening to the soil, water and air environment, while solutions are only restricted top temporary measures.