The scientific community has now widely accepted climate change as a reality. It is the most dynamic existential threat to be faced by the humanity. Changing climate is bringing about rapid changes in the environment. This book presents authoritative contributions from national and international researchers on pattern of change in climate variables and their environmental consequences. Book covers the consequences of change in climate variables both to physical and biological environments. It also discusses the possible impact on livelihood options of the people and identifies the feasible mitigation and adaptation options available to the planners and administrators. The book presents the specific case studies carried out in different environmental and ecological conditions to demonstrate the signs of climate change impact on environment and methodological approach that can be adopted to address these issues scientifically. This book is a baseline reference for researchers, environmentalist, planners, policy makers as well as administrators who are concerned with the future of the planet Earth.