Earth's Great Rivers

Sinossi:

Travel along three more of the planet's most spectacular rivers; the Danube, the Yukon and the Zambezi. Find out how the Danube is coping with years of human impact. Visit the Yukon and see the rich variety of life that has made this great frozen river home. And explore the length of the Zambezi and meet the hippos, elephants, lions and buffalo drawn to its wild waters.