"Interest in plants as air purifiers - what's called 'phytoremediation' - comes amid mounting concerns about the quality of indoor air. People spend more than 90% of their time inside, where levels of a dozen common organic pollutants can be two to five times higher than outside, according to the EPA."
A Superhero Scrubs The Air: The Mighty Houseplant
by Gwendolyn Bounds
http://online.wsj.com/article/SB20001424052748704893604576200423930895948.html
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