UNEP and UN-Habitat announced today the publication of “case studies from around the world on cities, ecosystems and biodiversity.” I’ve had a quick look at a number of the summaries of studies on individual cities, including that on Rome, but unfortunately could find little evidence that agricultural biodiversity was even considered. That is a pity. Lots of agriculture goes on in cities, even cities in industrialized countries, in small homegardens and on terraces, in allotments and along roadside verges. ((Later: Coincidentally, this article on urban agriculture in Manila cropped up in my RSS feed today, but only after I’d written the above.)) The people involved are dedicated and knowledgeable. Often, they grow old, rare varieties and otherwise unusual species. Why not enlist them into the more general biodiversity conservation effort?