Scented products cause indoor air pollution on par with car exhaust

I don't have any scented products in my house. Ventilation is key, especially in common areas like the living room. You should open the window occasionally even in the dead of winter to help circulate the air.

Some other things I do are regular vacuuming and dusting; you might be surprised how effective this can be in freshening the air naturally. Dust can trap odors and make a room smell stale if not removed often.

It also helps to clean soft surfaces frequently, because fabric traps odors.

Abundant houseplants help naturally purify the air. Activated charcoal in discreet places absorbs odors without adding any scent.

Unscented products like vinegar or baking soda work well for carpet and upholstery (the vinegar smell dissipates quickly).

> Abundant houseplants help naturally purify the air.

apparently the effect is grossly overstated. You'd need to cram the place (in all dimensions) so tightly with plants there'd be no room for humans or furniture of any kind for any appreciable difference.

The GP is not talking about removing CO2 from the air.

Even though no, it's not as simple as they put it, plants do remove particles from the air, humidify it, and emit plenty of stuff on their own (what may or may not be good). You don't need a lot of them to have a large impact.