A green roof movement has slowly been gaining momentum in recent years and some cities have even made them part of their sustainability plans. Chicago boasts that 509 city roofs are now planted with greenery, a statistic that includes the City Hall roof garden. This big picture features the 600 square metre urban and organic market garden, ØsterGro Rooftop Farm in Copenhagen. Since 2014, the ØsterGro market garden has produced organic vegetables, eggs and honey. A recent US study indicates that CO2 emissions per kilo of produce grown on urban roofs are 2kg lower than for the same produce bought from a store.
PHOTO Lars Just