Several books have been written by justly famous authors and Environmentalists about the Impacts of climate changes. These volumes are extensive and in depth studies, and often suffer from an over emphasis on one aspect at the cost of another. The present small effort, however, brings together various aspects of the effects of climate change and ecosystems. Major and important details are effectively discussed while several relevant but little known details are also highlighted. The Endeavour has been to present complex and truly vast material in a brief and easy to understand manner, and we hope our readers find the book of use and interest.