Earth formed 4.54 billion years ago. It is our Planet A, the only home, which sustains life through its geology, atmosphere, and biosphere. Over eons, evolution allowed countless species to thrive - yet 99% are now extinct. The remaining 1% survived because environmental changes were slow enough for adaptation. This miracle of life is unique in the known universe. Yet today, humanity has triggered a crisis: our actions are disrupting Earth's natural balance. Burning fossil fuels is accelerating global warming, causing changes too rapid for evolution to mitigate. Irreversible climate tipping points are imminent; they presage catastrophic consequences for us all and countless other species. Without unprecedented action now, climate change will doom humanity and much of life on Earth to extinction within a few centuries. Current leaders fail to act decisively, prioritizing short-term gains, wealth and power over longer term survival. Oil companies and politicians delay vital measures, leaving future generations to suffer irreversible trauma. This book exposes the stark truth of these realities and offers a roadmap. Understanding them demands action, if you care about your descendants. Read this book, then raise your voice and act.