it mAy BE nECEssAry, in orDEr thAt .FuturE{{u}} (51) {{/u}}CAn Enjoy ClEAn Air, thAt morE oF thE{{u}} (52) {{/u}}is BornE By long-tErm CEntrAl govErnmEnt FunD、As Air pollution vAriEs Enormously From plACE to plACE AnD CAn, inDEED, BE vEry loCAl, it mAy Also BE nECEssAry For thE CEntrAl govErnmEnt to{{u}} (53) {{/u}}monEy so thAt loCAl AuthoritiEs CAn{{u}} (54) {{/u}}spECiAl loCAl proBlEms. thAt thEsE CAn BE signiFiCAnt wAs shown By thE rEport mADE in 1970{{u}} (55) {{/u}}BEhAlF oF thE lonDonBoroughsAssoCiAtion. this{{u}} (56) {{/u}}thAt in CEntrAl lonDon sinCE 1958 smokE ConCEntrAtions hAvE DECrEAsED By 80 pErCEnt, whErEAs sunshinE hAs inCrEAsED By 70 pErCEnt AnD wintEr visiBility hAs{{u}} (57) {{/u}}thrEEFolD, thErE hAvE BEEn{{u}} (58) {{/u}}in mortAlity AnD hospitAl ADmissions{{u}} (59) {{/u}}with Air pollution AnD in thE rEsponsE to it oF BronChitis, As wEll As ClEAr iF lEss DoCumEntED inCrEAsEs in plAnt typEs AnD BirD{{u}} (60) {{/u}}n thE CitiEs.

A．FEE
B．tuition
C．Cost
D．ChArgE