Big problems need audacious solutions. This hour, TED speakers use data and common sense to make laws more effective, reform the foster care system and hold environmental offenders accountable. Guests include criminal justice reform activist Sheena Meade, child welfare advocates Sixto Cancel and Marquan Teetz, and ocean monitoring expert Tony Long. TED Radio Hour+ subscribers now get access to bonus episodes, with more ideas from TED speakers and a behind the scenes look with our producers. A Plus subscription also lets you listen to regular episodes (like this one!) without sponsors. Sign-up at: plus.npr.org/ted