Do houseplants actually improve air quality? / 
Sam Nicholls. 
 - Asia Edition. 
 - Singapore:  JSIM Education,  May 2022. 
 - 87 page. 
 - BBC Earth.  No. 6.  Do you know?  Vol. 14. .
<br/><br/><label>ISSN: </label>2737-5560 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants.--House.
<br/><br/><label>Dewey Class. No.: </label>BBC Earth N5147 May 2022