Reviews Salt Marshes: A Natural and Unnatural History by Judith S. Weis and Carol A. Butler Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News October 23, 2009 at 1:01 pm A biologist and writer team up to describe human impacts on salt marshes. Rutgers Univ., 2009, 254 p., $23.95. SALT MARSHES: A NATURAL AND UNNATURAL HISTORY BY JUDITH S. WEIS AND CAROL A. BUTLER