FILE PHOTO: A solar array, a linked collection of solar panels, can be seen in front of a residential apartment block in the Sydney suburb of Chatswood in Australia, July 28, 2017. REUTERS/David Gray/File Photo
FILE PHOTO: A solar array, a linked collection of solar panels, can be seen in front of a residential apartment block in the Sydney suburb of Chatswood in Australia, July 28, 2017. REUTERS/David Gray/File Photo