${CO_2}$ is plentiful in Martian atmosphere. $H_2$ can be produced on Mars using sunlight and can be reacted with $CO_2$ to form $H_2O+C$, or $CH_4+H_2O$.
Is it a feasible chemical reaction?
${CO_2}$ is plentiful in Martian atmosphere. $H_2$ can be produced on Mars using sunlight and can be reacted with $CO_2$ to form $H_2O+C$, or $CH_4+H_2O$.
Is it a feasible chemical reaction?
Is production of methane possible on Mars?
Yes, via the Sabatier process. This has been proposed multiple times as a type of in-situ resource utilization on Mars. All that's needed is energy (e.g., sunlight), CO2, and hydrogen. The first two are easily obtainable. Except near the poles, the last is a bit of a challenge.