{
    "What are the results of the most recent NASA experiments on creating oxygen on Mars?": [
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    "What is the name of the equipment that NASA built to create oxygen?": [
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            "Moxie": [
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            "aka: Mechanical Tree": [
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    "What was the cost of NASA's attempt to create oxygen?": [
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    "When is NASA (or other space agencies) planning to send people to Mars?": [
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            "Possibly by 2030": [
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    "How does MOXIE create oxygen?": [
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            "Electrolysis of salt water in subsurface lakes on Mars": [
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    "How much oxygen does MOXIE create on average?": [
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        {
            "10-22 grams/hour": [
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            "Up to 10 grams/hour": [
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    "What will oxygen on Mars be used for?": [
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            "refueling rockets": [
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            "Refueling rockets used by humans to return to Earth from Mars": [
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            "Solving the oxygen resource problem on Mars": [
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            "breathable gas, jet fuel, and water when mixed with hydrogen": [
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    "How much fuel is needed to launch a rocket with 4 astronauts from Mars to Earth?": [
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        {
            "Approximately 7 tons": [
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    "How much oxygen is needed to launch a rocket with 4 astronauts from Mars to Earth?": [
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        {
            "Approximately 25 tons": [
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            "27.5 tons": [
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    "How is the MOXIE equipment protected?": [
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        {
            "Coated with a thin layer of gold": [
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            "Must be made of heat-resistant material": [
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    ],
    "How does a thin layer of gold protect MOXIE?": [
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        {
            "Prevents surface from heating": [
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            "Protects nearby electronics": [
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                "a659e3f3-37b9-4e71-b5e1-5020bc4f72b3"
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    ],
    "How many more tests will MOXIE undergo?": [
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        {
            "Nine tests": [
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                "2f73c974-c00c-4f77-a49d-42125c4e0c3b",
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            "More experiments": [
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            "At least nine tests": [
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    ],
    "What pitfalls have been identified when creating oxygen from CO2 on Mars?": [
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        {
            "carbon monoxide is created": [
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            "carbon monoxide, a byproduct, is created": [
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    "How can carbon monoxide from creating oxygen from CO2 be contained?": [
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        {
            "Ceramic elements can filter CO": [
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    ],
    "What substance on Mars can be used to create oxygen?": [
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        {
            "CO2": [
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                "2ce3b0ca-b958-4541-8255-fc70ad7186a8"
            ],
            "Carbon Dioxide": [
                "adcd96d6-9349-463b-ac03-5c31b47fe259",
                "98961465-3e52-44f8-aeaa-753ea0f10e55",
                "b208481b-bdda-49fc-ab73-1c0fb43fef30",
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                "022ffb3d-ab48-4513-a012-b3565c25a5af",
                "d655658c-4bff-4ed1-95c3-7b00517b7275",
                "94be6797-91aa-4e53-9c26-4731a3b49188",
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                "f23d0347-2a7a-42e3-92ae-041c694da975",
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                "51595268-7a63-4b5e-bdb6-656faf099a41",
                "16529d0c-39b5-48d4-b26e-4a452a7ebc6b",
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                "1bf2de01-ff12-4698-9d71-36b336a35d6f",
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                "a659e3f3-37b9-4e71-b5e1-5020bc4f72b3",
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                "3be5e9f9-b7fb-490d-90aa-05e569a58383",
                "453d68f4-f1f8-495d-aebc-7570d69e746c",
                "001cf2c0-0d61-4154-8281-a7b93e15df20",
                "25b75975-526f-4b71-9254-01dcf1a63c4d",
                "543cbc5b-6420-41f4-976b-dde2b524067e",
                "679b1bcf-458a-47b3-af5f-9908237e580e",
                "9b8bc268-c55b-4127-8bcb-7db17237c8e9",
                "2ce3b0ca-b958-4541-8255-fc70ad7186a8"
            ]
        }
    ],
    "What electrocatalyst creates oxygen from elements found on Mars?": [
        "OR",
        {
            "lead-ruthenium oxide": [
                "94be6797-91aa-4e53-9c26-4731a3b49188",
                "51595268-7a63-4b5e-bdb6-656faf099a41",
                "3c229607-3017-439f-98cf-f2f5d57f19c2"
            ]
        }
    ],
    "How much more energy efficient is using lead-ruthenium oxide than MOXIE?": [
        "OR",
        {
            "25 times": [
                "94be6797-91aa-4e53-9c26-4731a3b49188",
                "51595268-7a63-4b5e-bdb6-656faf099a41",
                "3c229607-3017-439f-98cf-f2f5d57f19c2"
            ]
        }
    ],
    "What are the advantages of using lead-ruthenium oxide?": [
        "OR",
        {
            "Equipment is lighter": [
                "94be6797-91aa-4e53-9c26-4731a3b49188",
                "3c229607-3017-439f-98cf-f2f5d57f19c2"
            ]
        }
    ],
    "What substance on Mars could be used to create oxygen?": [
        "OR",
        {
            "brine": [
                "99981532-c91e-4227-9319-b8ddd5047f2d",
                "94be6797-91aa-4e53-9c26-4731a3b49188",
                "51595268-7a63-4b5e-bdb6-656faf099a41",
                "3c229607-3017-439f-98cf-f2f5d57f19c2",
                "8db397fb-1c34-414c-8544-88806f9ee81d"
            ],
            "Salt lakes": [
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                "3c229607-3017-439f-98cf-f2f5d57f19c2",
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                "25b75975-526f-4b71-9254-01dcf1a63c4d",
                "8db397fb-1c34-414c-8544-88806f9ee81d"
            ],
            "ice": [],
            "Salty water in lakes beneath Mars' surface": [
                "2ce3b0ca-b958-4541-8255-fc70ad7186a8",
                "25b75975-526f-4b71-9254-01dcf1a63c4d",
                "8db397fb-1c34-414c-8544-88806f9ee81d"
            ],
            "carbon dioxide": [
                "f7c65eae-b94a-4f0e-81f4-0a7730e29848",
                "a659e3f3-37b9-4e71-b5e1-5020bc4f72b3",
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                "453d68f4-f1f8-495d-aebc-7570d69e746c",
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                "9b8bc268-c55b-4127-8bcb-7db17237c8e9",
                "2ce3b0ca-b958-4541-8255-fc70ad7186a8"
            ]
        }
    ]
}