11 June 2009 - Belgium is traditionally known for its hearty, and some might say heart attack inducing, cuisine. But for one day a week, the citizens of one town are being encouraged to ignore the steak and look kindly on lentils, as Ghent introduces Vegetarian Thursday.

Host Marnie Chesterton takes a trip to this European veggie hotspot, to see how the idea is catching on. Also on the show, a decade ago, a disease swept the Samoan islands, virtually obliterating its core crop, taro. What lesson have been learnt?

Martin Palmer from the Alliance of Religions and Conservation explains what place religion has in saving the environment and Professor Mike Hulme suggests why everyone gets so hot and bothered about the issue of  climate change.