Greta's legacy in Germany: Climate activists fight to keep the pace

A file photo of Thunberg with her classic 'Skolstrejk for Klimatet' sign in front of the city hall in Hamburg, Germany. Photo: Daniel Bockwoldt/dpa

On a Friday in August of 2018, a young Swedish schoolgirl played hooky and sat in front of the parliament in Stockholm, demanding that her country's leaders do more in the fight against climate change.

Greta Thunberg, who was 15 at the time, had no idea how her one small action would send ripples across the globe.