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i <br /> For >60 , a earsvariety of <br /> Y Y <br /> substances have run off with <br /> freshwater to the lagoon: <br /> • Soil from erosion and <br /> wash-out from sod <br /> 4 Zaf <br /> • Grass cuttings and <br /> other vegetation <br /> 197 r <br /> • Nutrients 1 r <br /> (nitrogen, phosphorus) <br /> Natural strand and shell <br /> (Credit:Brevard County Nat(grgu,1950) <br /> 1 <br /> Population Growth <br /> Indian River County Brevard County <br /> thousands (thousands) ('= <br /> (thousands) § •� �3 v=fk, it <br /> 0 50 100 150 200 0 200 400 60 - - <br /> 2020 <br /> -550,000) <br /> 2015(pop.-140,000} 2015(pop. <br /> a -> <br /> 2000 <br /> I <br /> 1980 I �J �/• ` <br /> �..� . <br /> 1960 <br /> f 1950(pop.11,900) , 1950(pop.23,000) 1_g <br /> 1940 <br /> Natural sand and shell <br /> (Credit:Brevard County Nat(4vefe&jg50) <br />