Climate change leads to increased colonic archaeal growth and archaeal endosymbiosis. The archaeal endosymbiosis leads to methanogenesis and generation of PAH and global warming. The global warming again leads to increased endosymbiotic and colonic archaeal growth leading on to a vicious cycle. The human diet in the modern era with low dietary fibre and increased fat and protein also leads to colonic and endosymbiotic archaeal growth. This can also leads to increased human methane production by colonic and endosymbiotic archaeal growth initiating global warming. Climate change causes emerging viruses from human endosymbiotic archaea, abiogenetic porphyrin templates and extraterrestrial sources to originate as a part of earth adaptation syndrome. The emerging viral pandemics paralyse the human population systems and economic activity leading to grounding of the population and closing down of national economies. This leads to reduction in green house gases and global warming. Viralpandemics leads to revitilisation of the earth - reversal of global warming and species change. Veganism is the basis for the future of sustainable human civilization on mother earth.