Greta Thunberg tells UK climate strike: 'The world is on fire'Climate activist Greta Thunberg has warned "those in power" she will "not be silenced when the world is on fire."
The teenager was welcomed by chants of "Greta, Greta" as she addressed some 15,000..
Greta Thunberg asks UK: 'I will not be silent while the world is on fire – will you?'Greta Thunberg at a rally in Bristol, England asks the crowd: "I will not be silent while the world is on fire – will you?" on Friday (February 28).