ALBAWABA - In Sao Paulo, Brazil, on a river called "Tietê River", white foam that could fool someone to think there're clouds seen blocking water in the Brazilian river. But sadly, what was on the river wasn't normal clouds, but foul-smelling toxic foam. Drone images showed clouds of foam floating on a stretch of the Tietê River in the town of Salto, which is the largest river in the town ...