Do Plants Really Purify Indoor Air?

There’s a popular belief that certain plants, whether kept indoors or outdoors, can help purify the air by reducing pollutants. But is that really true?

NASA once conducted a study that suggested some plants can purify the air in sealed indoor spaces. However, that research was done in very small, controlled environments—more like tiny chambers than real homes. According to calculations by the Environmental Protection Agency (EPA), based on that study, you would need around 680 plants to significantly purify the air in a typical home. Clearly, that’s not a practical solution for most of us.

So, do plants in homes, balconies, rooftops, or small front yards offer us any real health benefits? What does medical science say?

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The Harsh Truth About Pollution

As cities grow, trees are being cut down indiscriminately. As a result, our natural sources of oxygen are shrinking. The very plants that absorb the carbon dioxide we exhale are being destroyed by us. Industrial activities and urban development are continuously adding pollutants to the air. You’ve probably seen the dust-heavy air around construction sites. And that’s just one example—vehicle emissions, cigarette smoke, and other pollutants all mix into the air, making it hazardous, even if it looks clear. This is the air we breathe—me, you, and our children.

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The Gentle Touch of Green

It’s hard to say whether any specific plant can absorb all the various pollutants in the air around us—science hasn’t fully confirmed that yet. But one thing is certain: areas with more greenery tend to have cleaner air. Even visible dust often settles on leaves, and during hot seasons, plants can help cool the air a little. Additionally, the presence of greenery has been shown to reduce stress and fatigue, bringing a sense of peace and mental well-being. So, any plant you keep around your home will likely offer some benefit—if not by purifying the air, then by soothing your mind.

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Popular Plants Said to Reduce Pollution

Some people believe that plants like neem or rubber plants near the home can improve indoor air quality. Others recommend Areca Palm, Bamboo Palm, Spider Plant, Dracaena, Snake Plant, Money Plant, Aloe Vera, Peace Lily, or Boston Fern for air purification. While there are some studies supporting these claims, none are entirely conclusive or beyond scientific doubt.

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What You Can Do

Plant greenery wherever you can—indoors, on rooftops, or around your house. It doesn’t matter what type of plant it is; you’ll likely benefit from it in one way or another. But do keep in mind that some plants can be toxic if ingested, especially for children and pets. Always do your research before bringing a new plant indoors. If a plant is known to be toxic or you’re unsure, make sure it stays out of reach.

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In short: While the dream of having an air-purifying jungle in your living room may not be entirely backed by science, plants still bring enough mental, emotional, and aesthetic benefits to make them a wonderful part of your home. So go ahead—go green!