Escalating Worldwide use of Urea - A Global Change Contributing to Coastal Eutrophication Glibert, Patricia M. ; Harrison, John ; Heil, Cynthia ; Seitzinger, Sybil Abstract Publication: Biogeochemistry Pub Date: February 2006 DOI: 10.1007/s10533-005-3070-5 Bibcode: 2006Biogc..77..441G