According to researches, we spend most of our time in closed areas.
Even though we ventilate the rooms, since outside is not free from air-pollution it is not possible to fully remove the harmfull toxins from the living areas.
But these air cleaning plants will help you remove toxins and improve air quality. Since they remove different toxins, it will be a better idea to use a combination of them.
Some of the plants could be toxic to animals so it will be better to make a research which types to use before buying.