Biologist Alain Bombard explains the problem of ocean pollution. The rivers have always brought soluble products to the sea, which is why the oceans are salty. The problem becomes serious when men start pouring sewage from sewers into streams. The self-purifying power of the sea will reach its limits in the face of increasing human activities and the expansion of coastal cities, as is the case in Marseille. Aerial views of river mouths and layers of pollution illustrate his point.
Producteur: Les Actualités Françaises - Participant : Bombard, Alain
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Producteur: Les Actualités Françaises
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