Greta Thunberg condemns world leaders in emotional speech at UN.

Teenage climate campaigner Greta Thunberg has become the poster girl of the climate change movement  culminating in her empassioned speech at the UN Climate summit yesterday. Some commentators, however, have accused climate activists of exploiting Greta Thunberg. So, is she a role model for teenagers throughout the world, or is she being used by those around her? Stephen got the views of commentator Phil Kelly and Brendan O'Neill from Spiked Online.