Plants purify this trapped air by pulling contaminants into the soil, where root-zone microorganisms convert VOCs into food for the plant. Plant parts such as stems, leaves, branches, and trunks absorb sound. Just one plant per workspace can provide a very large lift to staff spirits, and so promote Well-being and performance. Many hospitals grow plants both outside and inside their facilities. Another benefit of growing indoor plants is that growing indoor plants is that they can help patients recover more quickly.