Meet Heather McTeer Toney, the National Field Director at Moms Clean Air Force, which fights for climate safety to protect our children's health. She shares how her two terms as the first African-American, first female and youngest mayor of Greenville, MS helps her be an even more effective activist, and what one thing motivates people to make big changes.

Special thanks to our friends at Bioneers, producers of the Bioneers: Revolution from the Heart of Nature podcast, for production assistance.

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And when you’re done, come on over to The Inflection Point Society, our Facebook group of everyday activists who seek to make extraordinary change through small, daily actions.