Russian studies is an interdisciplinary field crossing history and language studies. It is closely related to Soviet and Communist studies and many times is included under Slavic studies.
Fish populations are declining in many of Europe's inland waterways, partly as a result of exposure to aquatic pollutants such as from wastewater treatment plants.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
