This program examines the workings of the Earth's biosphere. It discusses how the one way flow of energy from the sun underpins the continual recycling of molecules between living & non-living states. Featured are: ? Key nutrient cycles including carbon/oxygen, nitrogen and phosphorous ? The research of Jean-Baptiste van Helmont. ? Discussion on how human practices are impacting on nutrient cycles ? An examination of how living things decompose. Time-lapse sequences of decomposing organic matter. ? A case study of the workings of a major coffee farm and how it's proprietors attempt to manage production thanks to their improved understanding of cycles in the biosphere.