Theearthisourhome；wemusttakeCareofit．Thismeanskeepingth...
问题详情：Theearthisourhome；wemusttakeCareofit．Thismeanskeepingtheland，airandwaterclean． Pollutionisadirtyword．Topollutemeanstomakethingsunfit(不合适的)oruncleantouse．Pollutioncomesinmanyways．Weseei...