the room air could contain different toxic components such as trichlorethene, formaldehyde or benzol. these substances can cause headache, nausea and sysã¼nea. some plants can remove these substances with their roots. that's, by the way, the reason, why i have such a jungle around me. spider plants, dragon trees, and the devil's ivy should be well suited for that job. these plants are easy to keep and can reduce the concentration of toxic substances up to 80% there are also some special pots what ventilate the roots of the plants and support the cleaning process. you can buy these pot on amazon. there is a link in my video description, where you can buy it.