With the world's bee population plummeting at an alarming rate, a London architecture firm set out recently to prove just how easy it is to use leftover lumber to build guerrilla bee houses in the grittiest corners of the city. Bees Hives, Mason Bees, Hotels Cities, Bees House, Barebon Bees, Insects Hotels, Bees Lif, Honey Bees, Wildlife Gardens
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Replicating the nooks and crannies of a beehive. Scientists are still trying to pinpoint the cause of the alarming decline in the bee population in recent years. Image via Denizen Works.