Ella Jones will also be the Missouri city's first female mayor. She got involved in city government after the 2014 police killing of Michael Brown.
London Breed has taken on the role after Mayor Ed Lee's sudden death.
Cities and states are ready to tackle the climate crisis without Trump.
(WATCH) Former New York City Mayor Michael Bloomberg says cities are prepared to fight climate change.
Partisan divides can make it difficult for national legislators to come together.