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16th January 2016
12:52pm GMT

While it is harmless by itself, it forms another chemical, formaldehyde – which is listed as a human carcinogen – when it comes into contact with the air around us.
The best ways to tackle this issue is by opening a window or, as a team of experts at the BBC suggests, by having more household plants such as geraniums or ferns (they absorb the toxic chemical).
If homes are not properly ventilated, it can lead to high levels of limonene and therefore formaldehyde, which could potentially become unhealthy.
The study was led by Professor Alastair Lewis of the National Centre for Atmospheric Science at the University of York.Explore more on these topics: