"Ambitious, absorbing.Many fascinating deep dives.While Brannen doesn't shy away from the fearsome shape of our future, he finds ample joy in this deep-time journey, unafraid to puncture his expertise with gob-smacked wonder. And he takes great pleasure in language, always spry with a sentence.Brannen is an effusive, maximalist writer, a mind vividly alive on the page.And his arguments, like his writing, are hugely compelling. Entwined with his proselytizing for the importance of CO2 is another, more meaningful assertion, one that gives the book both tenderness and gravity." - New York Times Book Review "[Brannen] has a gift for translating recondite scientific facts into gorgeous psychedelic passages that verge on pure poetry.

This is history on a heroic scale." - The Times of London "For his second [book, Brannen] has higher ambitions, taking readers on dizzying jaunts through deep time to reframe our understanding of what may be the most vilified and misunderstood molecule on Earth.From the ancient past to the present day, Brannen makes the case that to understand CO2 is to understand the very fabric of our world." - Scientific American "Vividly grim, yet one of the most sweeping attempts yet to make sense of how we got here and where we're (likely) going. A good choice for readers interested in sustainable energy, climate change, and earth systems. - Library Journal "A rousing call to action.Comprehensive and compelling.Brannen deftly weaves his narrative, bringing to life the story of CO2 and its importance to all life forms.

This book.regularly evokes a kind of child-like wonder - and it does so for a subject that is so completely woven into our everyday life that we take it for granted.[Brannen becomes] ever more persuasive as he reaches his conclusion." - New Scientist "Peter Brannen offers a completely new vision of Earth and human history that will change your perspective forever. One vital, misunderstood molecule is revealed as the animating force behind everything that has ever happened on this planet--from the assembly of microscopic plankton seashells to the rise and fall of human empires. If we are smart, this impressive, beautifully written book will be a lodestar for the current generation's most important decisions." - Rebecca Boyle, author of Our Moon "As with everything Peter Brannen writes, this is fascinating; deep history brought vividly to life. But it's also crucial--our ability to understand and act on it will determine how the next period in earth's history unfolds.

" - Bill McKibben, author Here Comes the Sun "What a brilliant and epic book this is! From the magical transformation of CO2 into the first life to our current flailing attempts to pump less of it into our atmosphere, Brannen gives us a sweeping history of the planet in a single molecule. I study this stuff for a living and still learned so much--how coal nearly froze the planet, why the rocks beneath our feet allow us to breathe, and the origins of our modern industrial world. This book is a collection of wonderful things woven together into a fascinating, terrifying whole." - Kate Marvel, author of Human Nature "Peter Brannen delivers a moving and magisterial tribute to the magic-seeming chemical interplay of air and rock, plant kingdom and ocean expanse, which scientists dryly call the 'carbon cycle.' Upon it, he shows, absolutely all life rests--with growing, and unnerving, precarity." - David Wallace-Wells, New York Times bestselling author of The Uninhabitable Earth.