Can Houseplants Improve Air Quality?

The video discusses the potential of plants to purify indoor air, referencing a 1989 NASA study that showed plants could remove pollutants like benzene and formaldehyde in controlled lab conditions. However, later studies indicate that these results may not translate to real-world environments due to differences in conditions such as light and air circulation. Critics suggest that a large number of plants would be needed to achieve similar effects in a typical home. While some studies show plants can improve air quality, there is no consensus, and plants alone are unlikely to solve indoor air pollution issues.

What did critics suggest about the number of plants needed to achieve significant air purification in a typical home?

What conclusion did the 2014 review of studies on plants and indoor air quality reach?