A　sampling　campaign　of　re-suspended　road　dust　samples　from　53　sites　that　could　cover　basically　the　entire　Beijing,　soil　samples　from　the　source　regions　of　dust　storm　in　August　2003,　and　aerosol　samples　from　three　representative　sites　in　Beijing　from　December　2001　to　September　2003,　was　carried　out　to　investigate　the　characteristics　of　re-suspended　road　dust　and　its　impact　on　the　atmospheric　environment.　Ca,　S,　Cu,　Zn,　Ni,　Pb,　and　Cd　were　far　higher　than　its　crustal　abundances　and　Ca2+,　SO42-,　Cl-,　K+,　Na+,　NO3-　were　major　ions　in　re-suspended　road　dust.　Al,　Ti,　Sc,　Co,　and　Mg　in　re-suspended　road　dust　were　mainly　originated　from　crustal　source,　while　Cu,　Zn,　Ni,　and　Pb　were　mainly　derived　from　traffic　emissions　and　coal　burning,　and　Fe,　Mn,　and　Cd　were　mainly　from　industrial　emissions,　coal　combustion　and　oil　burning.　Ca2+　and　SO42-　mainly　came　from　construction　activities,　construction　materials　and　secondary　gas-particle　conversions,　Cl-　and　Na+　were　derived　from　industrial　wastewater　disposal　and　chemical　industrial　emissions,　and　NO3-　and　K+　were　from　vehicle　emissions,　photochemical　reactions　of　NOX,　biomass　and　vegetable　burning.　The　contribution　of　mineral　aerosol　from　inside　Beijing　to　the　total　mineral　aerosols　was　∼30%　in　spring　of　2002,　∼70%　in　summer　of　2002,　∼80%　in　autumn　of　2003,　∼20%　in　PM10　and　∼50%　in　PM2.5,　in　winter　of　2002.　The　pollution　levels　of　the　major　pollution　species,　Ca,　S,　Cu,　Zn,　Ni,　Pb,　Fe,　Mn,　and　Cd　in　re-suspended　road　dust　reached　∼76%,　∼87%,　∼75%,　∼80%,　∼82%,　∼90%,　∼45%,　∼51%,　and　∼94%,　respectively.　Re-suspended　road　dust　from　the　traffic　and　construction　activities　was　one　of　the　major　sources　of　pollution　aerosols　in　Beijing.　©　2007　Elsevier　Ltd.　All　rights　reserved.