BBC4: Feeding the Crops of the Future

Duration: 28 mins 

Tom Heap looks at whether we’re running out of phosphorus, a key ingredient of fertiliser, and vital for life. All ours is imported, so should we be worried about future supplies? Produced by Jolyon Jenkins

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Aired on BBC Radio4: Costing the Earth program

Man’s effect on the environment, questioning accepted truths, challenging those in charge and reporting on progress towards improving the world. Presenters, Tom Heap and Dr Alice Roberts, travel the UK and the world in search of solutions to the challenges facing the natural world and the people and wildlife that live in it. Broadcast at 21.00 on Mondays, Costing the Earth runs for 27 weeks of the year, split into three series. Podcast episodes are added weekly.