Feel like this would be an amazing selling point to get people to try sous vide style cooking, though I’ve never used it personally, I’ve heard nothing but good things about it, and it seems like it would be pretty sterile since everything is just warming up in a contained bag.
Sous vide has the problem of time and inflexibility.
Don’t get me wrong, it’s easy to produce a literally perfect steak or whatever. The thing with steaks though, is that they look awful unless you take them out and slap a very high heat sear on them- and they lack the browning and carmelization the sear provides (which is a source of the flavor- especially in chicken breasts,)
As for time, it’s going to add a couple hours to it, and for some reason, nobody mentions the time it takes to get up to temp to begin with. (You can shorten this by preheating the water, mind- microwave and stove are both faster.).
The real take away is to use a hood on your cooktop- either one that vents to outside or a filter capable handling it. (Also, clean your hoods. Just saying.)
I don't think you can reduce air pollution by cooking sous vide. After the sous vide part, the food is probably grilled and then you have all the smoke again. See an example in this short video: Steak sous vide