Modern problems of biology, ecology, chemistry . H. 2" by R. C. Begunova, published by Yaroslavl State University, is a fascinating and in-depth study of topical issues related to three interrelated scientific disciplines. This work will become an indispensable source of information for students, teachers, researchers and anyone interested in modern challenges in the field of biology, ecology and chemistry. The second volume of the book continues the traditions of the first edition, plunging the reader into the world of complex scientific concepts and practical research. Unlike many textbooks, which often present the material in a dry and academic style, Begunov and his team strive to make the text accessible and understandable, while maintaining scientific rigor. This allows readers not only to absorb information, but also to develop the critical thinking necessary to analyze contemporary environmental and biological problems. The book covers a wide range of topics, ranging from molecular biology to sustainable development and environmental issues. Readers will be able to learn about the latest advances in genetics, ecosystem research, and chemical processes affecting the biosphere. Each section of the book is filled with relevant examples, which makes the material alive and relevant. For example, the authors discuss the impact of climate change on biodiversity and ecosystem services, and consider new approaches to address pollution and conservation of natural resources. This book will be of particular interest to undergraduate and graduate students studying biology, ecology, and chemistry, as well as teachers who are looking for up-to-date and relevant materials for their courses. It will also attract the attention of environmentalists, biologists, and chemical practitioners working in a variety of fields, including environmental protection, agriculture, and medical research. Even a wide audience interested in the issues of ecology and sustainable development will be useful to get acquainted with