Spending most of our day indoors is a fairly recent development in the span of human existence. We evolved alongside nature, so it's no surprise that being around plants and green space can improve productivity at work by 15% or more, according to a number of studies.

Introducing just a few houseplants to your office-;everyone should be able to see one from their desk-;can improve memory, reduce stress and absence due to illness, and even boost creativity.