There’s a reason why the sounds of nature — chirping birds, flowing streams, falling rain — are often sound options for white noise machines and meditation apps: They’re calming.

A new small study published in Molecular Psychiatry further underscores this. The study found that a one-hour nature walk reduces stress when compared to a one-hour walk in a bustling city environment.

The study followed 63 people who were randomly assigned a nature walk or an urban walk. The nature walk took place in a forest in Berlin and the urban walk took place on a busy street in the city. ...