Tackling challenges no generation can face alone.

Author and climate activist Bill McKibben is the founder of Third Act, an effort to activate older Americans as a force for social good. His reasoning? People over 60 often have the time, money and skills to do the work — and the planet needs their experience.

This conversation features McKibben along with Katie Eder, youth climate activist and executive director of Future Coalition and Pennie Opal Plant, co-founder of Idle No More SF Bay.