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In the mid-21st century, environmental issues have become a major problem plaguing mankind. Scientists use spacecraft to transport excess carbon dioxide gas in the atmosphere to Callisto, a moon of Jupiter, to reduce the concentration of greenhouse gases on Earth. A few years later, a serious nuclear leak occurred in country A. The leader suggested an opportunity to build a garbage base on Callisto and transport nuclear waste there. This time, the spacecraft suddenly disappeared after reaching Callisto. Then humans were attacked by aliens of unknown origin. Aliens sent artificial earthlings to infiltrate the earth and used a series of new weapons such as plant viruses and solar prisms. Humanity is in crisis! Where do these aliens come from? What does "humanoid ventilator" refer to? What is the truth hidden behind a series of mysteries? The responsibility of saving the earth is now up to you! Open this book, experience a thrilling adventure, and reverse the future of mankind!