'Never give up,' Swedish teen tells Iowa climate activists after U.N. summit 'failure'

Teenage climate activist Greta Thunberg on Friday urged her supporters to "never give up" in demanding urgent steps to fight climate change after world leaders failed to act decisively at a recent United Nations summit.

'Never give up,' Swedish teen tells Iowa climate activists after U.N. summit 'failure'
Teenage climate activist Greta Thunberg on Friday urged her supporters to "never give up" in demanding urgent steps to fight climate change after world leaders failed to act decisively at a recent United Nations summit.