Whether he’s playing nightclubs or talking environmental politics, Cajun bluesman Tab Benoit’s passions are grounded in the love and loss of people and places. A native of Houma, Louisiana, the Grammy-nominated artist is a leading advocate for the preservation and restoration of the Mississippi Delta. Benoit’s activism has earned him trips to testify before Congress, gigs at both the Democratic and Republican national presidential conventions, and the 2009 Governor’s Conservation Award from the Louisiana Wildlife Federation. Since founding the conservation group Voice of the Wetlands (VOW) in 2003, Benoit has worked tirelessly to keep wetlands loss in the public eye. How did you get your start as an activist?I was a flight instructor, and I flew over pipelines all over the coast. Our practice areas were over the swamp. Day after day I saw the adverse effects of messing with nature: islands and wetlands disappearing—we’re losing an acre an hour down here—leaks in the...