Can hill farming and conservation work together? Since taking over the tenancy of a Lake District farm in 2011, the Royal Society for the Protection of Birds has drastically reduced the number of sheep grazing on the hills, focusing instead on nature and land restoration. It's been a controversial move, attracting some fierce criticism.

Labelling on pork products is not particularly helpful for people wanting to make informed choices about what to buy; that's according to what's been described as the largest study of its kind by researchers at the universities of Cambridge, Oxford and Sao Paulo. They evaluated different methods of pig farming, assessing each systems' impact on biodiversity, greenhouse gas emissions, use of antibiotics and animal welfare, and found that none of the farm types performed consistently well across all four areas.

Presented by Steffan Messenger and produced by Beatrice Fenton.