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A Breath of Fresh Air In the late ’80s, NASA and the Associated Landscape Contractors of America studied houseplants as a way to purify the air in space facilities. They found several plants that filter out common volatile organic compounds (VOCs). Lucky for us, the plants can also help clean indoor air on Earth, which is typically far more polluted than outdoor air. Aloe (Aloe Vera) This easy-to-grow, sun-loving succulent helps clear formaldehyde and benzene,…