This book investigates the historical trajectory of atmospheric carbon dioxide and its profound impacts on life on Earth. It synthesizes advances from earth science, environmental science, and ecology to present a comprehensive account of global change and the evolving dynamics of Earth's biosphere, exploring the past, present, and future roles of CO₂.

The book is presented as a synthesis of various scientific fields, aiming to provide a comprehensive account of global change and its effects on life. Its approach integrates advances from earth science, environmental science, and ecology to address the future role of atmospheric CO₂. The content is structured to inform readers about the historical dynamics of the biosphere and likely future impacts on ecosystems. The framing suggests a text intended for those seeking a detailed understanding of climate change and its biological consequences.