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Humans are dreaming and planning settlements on Mars. There are ice deposits which with solar power could be used to produce oxygen to breathe, water to drink, and hydrogen and oxygen to fuel vehicles of all sorts. Food remains a challenge since the Martian soil contains poisonous perchlorate salts that can harm human health if absorbed by crops, has no organic material, and when wet can pack down like concrete making it difficult for plant roots to grow. Please don’t take the environment we have on Earth for granted.
