Saving the planet - on hands and knees

"Of all the men I never wanted to grow old into", writes Howard Jacobson, "this is the man I wanted to grow into least: the prepared-for-all-eventualities shopper".

Howard describes his hours of neatly folding plastic bags on his hands and knees on his living room floor...in order to let him shop responsibly.

Gone is his old profligacy. "The wild", he says, "have become the watchful".

Producer: Adele Armstrong