TY JOUR TI Condition of the air basin of Tula region KW Tula KW the ecological situation KW air KW pollution JO Actual directions of scientific researches of the XXI century: theory and practice AU Vladimirov, S.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov