G33 Elements of Ecology. Challenges to Human Survival. Environmental Protection: A Study Guide for Students of Pharmaceutical Universities and Faculties. – Irkutsk: ISMU, 2013. – 51 p. This study guide briefly outlines the history of the emergence of ecology as a science, as well as key ecological concepts and the challenges facing humanity at its current stage of development. Particular attention is paid to environmental protection issues. The guide is intended for students majoring in "Pharmacy" (specialty code 060301) for use when studying the "Fundamentals of Ecology" section of the "Botany" course.