This study guide covers topics in general and applied ecology within the framework of the ecology curriculum, presenting material on contemporary global and regional environmental issues. It is intended for use in higher education institutions (specializing in technical and biological fields), as well as in specialized secondary vocational colleges and academic lyceums. Published under the official endorsement and certificate No. 32-099 of the Ministry of Higher and Secondary Specialized Education of the Republic of Uzbekistan (Order No. 32 dated February 2, 2015).