mAn CAnnot prEvEnt thE worlD From BEing pollutED BECAusE_________.
A．pEoplE usE too mAny mAn-mADE mAtEriAls
B．thE pupulAtion oF thE worlD is inCrEAsing FAstEr
C．wE ArE proDuCing morE CArs, truCks AnD BusEs
D．wE hAvE morE AnD morE inDustry.