Why the Rev. Mariama White-Hammond believes Juneteenth and celebrating the end of slavery is a way to lead broader society to freedom from the destruction of the environment and climate change.Interview by Steve Curwood, Living on EarthFrom our collaborating partner “Living on Earth,” public radio’s environmental news magazine, an interview by host Steve Curwood with the Rev. Mariama White-Hammond, pastor of New Roots African Methodist Episcopal Church in Dorchester, Massachusetts. White-Hammond is also the former chief of environment, energy and open spaces for the city of Boston.