A silent disaster; Behind the curtain there is a stench that takes one's breath away from the Zorjuv and Gohraud rivers in Israel, which in the past were a source of drinking water and a place for fishing, today continue their way towards the Anzali wetlands, carrying with them a large amount of domestic and industrial sewage. In addition to the unpleasant face and the unbearable smell that this crisis created in the urban space, this crisis made Gilan district one of the most dangerous districts in terms of water pollution.