03/12/13 - Tuesday's Topical Currents is with journalist and public radio figure Nathanael Johnson. He’s the author of ALL NATURAL: A SKEPTIC’S QUEST. It’s a mix of science writing and memoir, and chronicles his “ecological anxiety,” with questions about man-made versus made-by-nature. Is there a middle ground? That’s Topical Currents with Joseph Cooper & Bonnie Berman . . . Tuesday at 1pm on WLRN-HD1, rebroadcast at 7pm on WLRN-HD2.