air pollution from industrial emissions; rivers polluted from raw sewage, major metals, detergents; deforestation; forest damage from air air pollution and resulting acid rain; soil contamination from large metals from metallurgical crops and industrial wastesB? N?i v? ??c tính m?t s? l??ng l?n (t? 600.000 t?i 750.000) ng??i Roma t?i Bulgaria; g?n