Earth
Why do rivers sometimes change colour?
Because rivers carry different tiny things at different times. Rain, mud, algae, minerals or glacial flour can tint river water brown, green, blue or milky. Flow and seasons change what the river carries.
Earth
Because rivers carry different tiny things at different times. Rain, mud, algae, minerals or glacial flour can tint river water brown, green, blue or milky. Flow and seasons change what the river carries.