We are all quite used to the idea of fertilizing the soil with the manure of animals and usually don't think twice about it. But imagine using human manure -- even your own -- to help grow the food that you eat. Some might scoff at the idea, but it's one that many have been researching, including Jörgen Fidjeland who discussed the use of faecal sludge as fertilizer at this year's Tropentag conference at the University of Hohenheim in Stuttgart, Germany... (read more)