The Tata Institute of Fundamental Research scientists have found the cheapest carbon dioxide conversion process.
This magnesium-assisted process mixes carbon dioxide, water and magnesium, at room temperature and pressure to get methane, methanol, formic acid and some hydrogen.
Magnesium carbonate is the by product.
It is used in the production of green cement and in the pharma industry.
With this process, one can make methane on Mars.
This is because,
Mars’s atmosphere is almost entirely comprised of carbon dioxide.