Here is the article – Keeping bees in cities could actually be BAD for them: City hives run the risk insect starvation | Mail Online by @UC Browser http://www.dailymail.co.uk/sciencetech/article-2392608/Keeping-bees-cities-actually-BAD-City-hives-run-risk-insect-starvation.html
The shock headline for this article is meant to draw your attention, what should have been made more prominent is the actual meaty goodness in there about the need for bee friendly planting! The inner city can be fairly sparse so rooftop gardens, balconies and window box gardens are needed all the more. We are lucky in Belfast to have such a wonderful forest of street trees maintained by the city council. The main variety we find is lime, which gives a beautiful tasting honey, but there are many species of tree across the city which supplement the nectar sources available to the honeybee.
So keep on planting people!