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Sodium Hydroxide, when exposed to Carbon Dioxide (already in the air), combines to become Sodium Carbinate.

NaOH + CO2 → Na2CO3 + H2O

Sodium Carbinate then reacts with water and more Carbon Dioxide to become Sodium Bicarbinate, which is baking soda.

Na2CO3 + CO2 + H2O → 2 NaHCO3

Not only does a Sodium Oxyde fuel cell produce electricity, it takes CO2 out of the atmosphere.

From a physics and chemistry point of view, it’s pretty cool. I’m curious how well it scales though.

Depends which part of myself I’m talking to. If it’s just a general conversation, it’s “we.” If it’s more of a direct conversation to a part of my mind, it’s “you.” If I’m talking about myself to a third-party, such as this response, it’s “I.”