Watch Contamination is... (1974) Official Trailer

The sectors studied are the Yumbo industrial complex (the rainbow of pollution), which threatens to create a fence of smoke and pestilence around the city of Cali. The Mamonal complex (Bahía de Cartagena) and the garbage of the big cities. The film, depending on its geographical direction, is divided into five chapters, namely: air, water, garbage, noise and lack of trees.