Colombia 1 Industria minera 1 Mining industry and finance 1 agricultural soils 1 anl̀isis multivariado 1 cobre contaminacin̤ 1 περισσότερα ... contamination copper 1 environment 1 environmental impact 1 gold heavy metals 1 hierro 1 impacto ambiental 1 iron 1 medio ambiente 1 mercurio 1 mercury 1 metales pesados 1 minera̕ 1 mining 1 multivariate analysis 1 oro 1 soil 1 suelos 1 suelos agrc̕olas 1 λιγότερα ...