The price farmers get for wool is up, about 20% up from last year, but it still doesn't cover the cost of shearing the sheep.

We hear from a dairy farmer who is getting out: this year’s exceptionally hot summer and the resulting cost of feed for the animals has proved too much.

Farming fish rather than livestock is being seen by some as the answer to sustainable food security. China is the world's biggest farmed seafood producer, providing more than 60% of the world's farmed fish, and it's investing in bigger and more high tech fish farms.

Presented by Charlotte Smith and produced by Beatrice Fenton.