Prof. Tomoaki OKUDa, Keio University, Japan, had lecture for resarchers and students about Atmospheric Aerosol and Impact to Human Life. The health problem caused by PM2.5 have become global concern and Prof. Okuda is the one of leading scientist in this theme. Prof. Okuda had meetings with Uzhydromet and othet institute related to air pollition. He also made inspection of Arar sea’s situation during his stay.