What Is the Likely Source of Methane in Mars Atmosphere

question 45

Multiple Choice

What is the likely source of methane in Mars atmosphere?

• A)Mars landings of exploration vehicles such as Spirit
• B)ongoing volcanic activity
• C)the decomposition of the residue deposits left from Mars oceans
• D)the absorption of Phobos' (Mars' larger, inner moon)methane atmosphere through gravitation

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