UC Riverside unveils new 'smog-eating' mural

Artists used special paint that helps transform surfaces into air-purifying agents.

[richm]

What percentage of greenhouse gasses come from people breathing?

[AlexanderZapataIndividual]

Smog eating paint. You must be kidding me.
The c02 cost of producing ANYTHING, like the paint itself, will overshadow whatever chemical reaction occurs that incorporates carbon from air into it.

Once is dry, no way it is leeching c02 from the air. Or it would noticeably affect it, caking the walls with Carbon.