39 Ways To Save The Planet

Monday-Friday, Radio 4, 1.45pm

Tom Heap (right) and Tamsin Edwards are hosting a timely new series. It examines radical ideas to combat climate change, beginning with an innovative, solar-powered, water-heating device invented by an Australian engineer.

Drama: Leni Goes To Hollywood (Radio 4, 2.15pm) is a blend of fact and fantasy about German film director Leni Reifenstahl's efforts to make a name for herself in the US in 1938. Elinor Coleman heads the cast.

My Name Is Philip (Radio 4, 11am) focuses on people who may not be able to make ends meet once they retire, despite having worked all their lives.