Whose waterfall creates the spray that feeds a rainforest ecosystem in South America?

The immense spray from Iguazú Falls helps sustain a humid microclimate around the waterfall system. That constant moisture supports dense subtropical vegetation and diverse wildlife. The falls are on the Iguazú River between Brazil and Argentina. Their sheer power and width make them one of the most impressive waterfalls in the world. The surrounding rainforest is as important to the experience as the cascades themselves.