Greta Thunberg: The 16-year-old who started a climate change movement

On September 20, an estimated 4 million people in 161 countries took to the streets in the largest climate change demonstration in history. At the helm of this Global Climate Strike was 16-year-old Greta Thunberg, who has entered the global spotlight over the last year as the leader of a youth movement that’s pushing governments and corporations to address the climate crisis.