Ключевые слова: acid, andalusia, background, bacteria, bottom, chemical, color, colors, contaminated, copper, deposit, ecology, ecosystem, exploitation, heavy metals, huelva, huelva province, industry, iron, landscape, locomotive, mine, minerals, mines of rio tinto, mines of riotinto, natural, nature, old, polluted, pollution, red, rio tinto, riotinto, river, shades, spain, spanish, steam, sulfur, textures, tinto, tourism, train, water, yellow,