TY CONF TI ASSESSMENT OF THE STATE OF ENVIRONMENTAL QUALITY IN VORONEZH BY THE BIOINDICATION METHOD KW dynamics KW morphological features KW the magnitude of asymmetry KW ecological and biological features KW birch tree JO FORESTRY-BIOLOGICAL FOUNDATIONS OF SUSTAINABILITY OF NATURAL AND ARTIFICIAL PHYTOCOENOSES AU Strebkov, M.L. AU Popova, V.T. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov