Who is the perfect witch? What does she have to do with global warming? Several scientists express doubts about the sole responsibility of CO2 on global warming. The book aims to shed light on this and disclose what has been stolen from common knowledge: experimental measurements, graphics, ideas and critical reasoning on the assumption that “the constant increase in CO2 concentration due to human activities is the sole responsible of the sudden rise in the Earth’s temperature”. It will be up to the curious and informed readers to draw their own personal conclusions.