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I was looking at the Kerbal calculator, but decided it would not be a rational time expenditure atm. Here's a less "Red" solution: Drop a hydrogen bomb on Mars, and skim a return spacecraft through the dust cloud. :)
About 20 years back I read an article in Analog proposing that terraforming Mars could most easily be effected by causing an artificial greenhouse effect via carpetbombing the place with millions upon millions of megatons of thermonuclear weapons. It'd sure free up some sequestered oxygen and nitrogen, you betcha.
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