Introduction MSW----worldwide challenge MSW on the street of Naples,Italy This is the second time in three years that the army has cleared Naples'rubbish 490 source:CNN&Times 2011,May 9 UNEPIntroduction MSW ----worldwide challenge MSW on the street of Naples, Italy This is the second time in three years that the army has cleared Naples' rubbish source:CNN&Times 2011, May 9