Cây quyết định True / False / Not Given

Urban beekeeping has grown rapidly in several European capitals over the past decade, with rooftop hives now common in Paris, Berlin and London. Advocates argue that city bees benefit from the long flowering season of park and balcony planting, which can extend well beyond that of surrounding farmland. Some ecologists, however, warn that concentrating managed honeybee colonies in small areas may place wild pollinator species under additional pressure. A survey of London beekeepers found that most had taken up the practice within the last five years. Whether urban hives produce more honey per colony than rural ones remains disputed among researchers.