Building an eco-civilization is vital to the sustainable development of the world. Our society will prosper when the environment improves and will lose vigor when the environment degrades. As a companion to Woe of Human, this book is a work of popular science on ecological and environmental sciences. Taking the question-and-answer form, it focuses on over 200 essential questions in the field of climate change and environmental protection. By analyzing various ecological and environmental phenomena in today's world, exploring their causes, and, more importantly, putting forward a series of constructive countermeasures, this book provides valuable insights into how climate change and environmental pollution can be addressed and offers valuable references for popularizing the scientific knowledge of ecology and environment, enhancing the public's awareness of protecting our ecology and environment, and promoting the progress of eco-civilization.