WATCH: Greta Thunberg's full speech to world leaders at UN Climate Action Summit

Greta Thunberg full speech at UN Climate Change COP25 - Climate Emergency Event

Teen activist Greta Thunberg delivers emotional speech at UN

Australia's 2035 emissions target announced | ABC NEWS

‘Dying’ glacier melting at an alarming pace in Switzerland

Jane Goodall: 'The environment is getting left behind'

'We will make them hear us': Greta Thunberg's speech to New York climate strike

Greta Thunberg urges all to join Friday's climate strike: 'See you on the street!'

Greta Thunberg leads New York protest for climate change action - watch live