I was reading about the dust devils on Mars. There's a strong theory that dust devils produce enormous static electric charges. These charges help keep solar panels clean on our Rovers, and precipitate Peroxide and Peroxide Snow from the atmosphere sterilizing the soil. Here's a great way to produce Oxygen for space colonies or maybe rocket fuel component. Manganese dioxide works as a catalyst of Peroxide to release Oxygen. Therefore, a light weight device could be engineered to capture the Peroxide and easily convert to Oxygen for a multitude of uses. Plants would be the ideal means to produce Oxygen, but requires protection from the cold, and a green house might not be sufficient protection.