In January 2020, a group of young climate activists held a press conference at the World Economic Forum in Davos. The Associated Press published a photograph of the event online: the image showed Swedish teenager Greta Thunberg and three other white women against a backdrop of snowy mountains.
But someone was missing. The only black member of the group, 23-year-old Ugandan campaigner Vanessa Nakate, was cropped from the image. When she politely tweeted AP to ask why, she found herself at the centre of a debate about racism in journalism – and the climate movement itself.