‘Plants take in carbon dioxide and release oxygen when they photosynthesise,” says John Tregoning, a professor at Imperial College London and author of Live Forever? A Curious Scientist’s Guide to Wellness, Ageing and Death. “If you’ve got enough of them, they should produce more oxygen than there was initially.”
It’s tempting to think of plants as a kind of natural air filter, cleaning the air in stuffy, poorly ventilated spaces. But the reality is different.
