The legendary folk singer's latest album benefits multiple charitiesAt age 83, Noel Paul Stookey still has plenty to say. The singer/songwriter, known as the "Paul" in the ‘60s folk trio Peter, Paul and Mary, recently released "Just Causes," a compilation of 15 songs, each highlighting a theme of social concern, including the environment, hunger, and drug trafficking, among others. The star paired each song in with an appropriate non-profit organization to benefit from the album’s net proceeds. And Stookey is no stranger to singing for a good cause. The group’s version of "If I Had a Hammer" became an anthem...