"You have stolen my dreams and my childhood with your empty words," were the emotional words of Greta Thunberg, the teenage Swedish environmental activist, who stormed at the world leaders gathered at the UN Climate Change summit in New York, adding, "We are in the beginning of a mass extinction and all you can talk about is money and fairy tales of eternal economic growth - how dare you!"Greta, who has become the global face of the growing youth movement against climate inaction, began her speech by telling her audience amusingly, "My message is that we'll be watching you."Continuing a stinging speech, the activist addressed the pressing issue of the dangerous global heating across the world, saying, "I shouldn't be here. I should have been back at school, on the other side of the ocean. Yet you all come to us young people for hope. How dare you?"