Mars, the fourth planet from the Sun, used to have an eco-system and social structure similar to that of Earth. According to Supreme Master Ching Hai, The Martians, like humans on Earth today, possessed the meat-eating habit and expanded their livestock-raising practices until they caused catastrophic global warming, with the methane, hydrogen sulfide and nitrous oxide produced by the animals poisoning the majority of their population.
So how did Martians survive? How did they learn to live underground? What are their social structure, spiritual practices, marital system, and diet like nowadays?