Houseplants have in recent years been marketed as a more aesthetic alternative to air purifiers. But how good a job can they actually do? https://www.economist.com/science-and-technology/2026/05/08/do-houseplants-improve-air-quality?taid=69fe790e4bb6d90001e00622&utm_campaign=trueanthem&utm_medium=social&utm_source=voante