Local environmentalists take on ExxonMobil, beginning litigation charging the petroleum giant with intentionally hiding what they've known about the science of climate change for years and years. Conservation Law Foundation President Bradley Campbell(@bradleycampbell) and Mystic River Watershed Association President EK Khalsadiscuss. 

From the pages of history, an unsung hero of our planet. Douglas Brinkley's (@ProfDBrinkley) new book, 'Rightful Heritage,' explores the environmental legacy of FDR. 

Remember the Ice Bucket Challenge? It was started  to help ALS patients like Pete Frates. His mother, Nancy Frates(@momfrates), talks about her recent trip to Washington to get more help fighting this disease.

And a little unsolicited advice from Jim to the presidential frontrunners when it comes to transparency.