Climate change poses significant threats to forest health worldwide. Rising temperatures contribute to increased frequency and intensity of wildfires, stressing forest ecosystems. Shifts in precipitation patterns affect water availability, crucial for forest growth and stability. Pests and diseases are spreading to new regions as temperatures become more favorable, threatening native tree species. These changes disrupt forest dynamics, leading to altered species composition and reduced biodiversity. Moreover, carbon dioxide buildup from human activities alters the chemistry of the atmosphere and impacts tree physiology. Conservation efforts must focus on adaptive strategies such as assisted migration of tree species, enhancing forest resilience through sustainable management practices, and reducing carbon emissions to mitigate these effects. Addressing climate change impacts on forests is essential not only for biodiversity conservation but also for the numerous ecosystem services forests provide, including carbon sequestration and watershed protection. The book presents researches and studies performed by experts across the globe. Such selected concepts that redefine climate change and forest health have been presented in this book. This book is meant for students who are looking for an elaborate reference text on forest conservation and climate change.