When this eTown episode first aired last year, our musical guests had one thing in common: They were all returning to the eTown stage after many years. They include the dynamic Australian band The Waifs, which normally consists of sisters Vikki Thorn and Donna Simpson and their longtime collaborator Josh Cunningham; and gifted singer/songwriter Jim Lauderdale, whose songs have been recorded by a Who’s Who of country and pop music stars over the years. Plus, we’ll hear from the young founder of a nonprofit that, he feels, will help with global warming while acting as a bridge to heal the political division re: climate change in this country.