TO GO WITH AFP STORY, "Going green: a tour of world cities in pictures"
People visit the Brooklyn Grange rooftop farming company and sustainability center during an open day, in the New York City borough of Brooklyn, on May 23, 2021. - In nine cities in the world, thanks to planting schemes on walls and roofs, the temperature during the warmest month in so-called street canyons -- flanked by high-rise buildings on either side -- can be reduced by 3.6 to 11.3 degrees Celsius at the hottest time of day, according to a report by the French Agency for Ecological Transition. Green spaces have also been shown to improve health and wellbeing, including reducing stress, anxiety and depression, improving attention and focus, better physical health and managing Post Traumatic Stress Disorder, Stephanie Merchant, of Bath University's department of health, said. (Photo by Ed JONES / AFP)