Greta Thunberg's father has spoken about how activism helped his daughter out of depression. Speaking to the BBC Radio 4’s Today programme, Svante Thunberg says he had thought it was 'a bad idea' for his daughter to take to the frontline of the battle against climate change but adds that her activism helped her battle depression. 'You think she's not ordinary now because she's special, and she's very famous, and all these things. But to me she's now an ordinary child,' he says. As part of Greta’s guest editorship of the programme, she also talks to Sir David Attenborough for the first time.