India's mighty Ganges, a river revered by a billion Hindus as a living goddess, is in trouble. Jeremy is on a 1,500 mile mission to investigate the problems first-hand to find out what is being done to save this holy river.

Wild and unnavigable, Africa's Zambezi boasts the world's mightiest waterfall, heart-pounding rapids and man-eating crocs. From the upper reaches in Zambia to the delta in Mozambique, Jeremy investigates the threats to this mighty river.