on the fire of war during hajj, ali soleimani, the correspondent of sada and sima news agency, madina manurah, the reason for the bitterness of the fish in the po river in poland has been determined after a year, and under the climate of poland, it is said that the sewage of the residential units, which is pregnant nitrogen and phosphorus have been the main cause of the loss of fish in the river. last year, more than ten tons of fish died in the po river in poland, and the government of this country decided a prize of 220,000 euros for identifying the causes of river pollution. hospitals, coal mines and factories industrial plants on the banks of the rivers are also one of the reasons for the pollution of this river, but it is not possible to close all of them overnight. the late reaction of poland and germany to deal with the pollution of this river has faced a wave of criticism in both countries. lyons is nicknamed the city of elko in the american state of nevada was attacked by locusts, in addition to occupying houses and roads , they also made access to hospitals difficult. there is a hou