Humans dump toxic waste from factories and laboratories into the river

humans dump toxic waste from factories and laboratories into the river, making the water appear increasingly murky and polluted and the background of smoky factories humans throw toxic waste from factories and laboratories into the river, making the water look increasingly cloudy and polluted and the background of the smoky factory humans are dumping toxic waste from factories and laboratories into the river, making the water appear increasingly cloudy and polluted and the factory background smoky