For some two million years our hominin ancestors enjoyed a long-term relationship with Mother Nature. Up until about 10,000 years ago—a mere hiccup in evolutionary terms—our survival completely depended upon successfully negotiating her ups and downs. Though we grew apart, man still harbors a meaningful affinity for nature, an adaptive holdover, some scientists say, from prehistoric times.
Though it’s been centuries since we began substituting environmental reliance with human wit, researchers believe that nature left a deep evolutionary mark on our psyches. A growing body of scientific evidence links nature with health benefits, including a reduction in stress and disease and a heightened sense of overall wellbeing.
Until now, however, how nature affects our experience of immediate, in-the-moment happiness remained a more elusive question. “Most people would agree that natural environments are happier places than other places,” says George MacKerron, Ph.D., a lecturer in economics at the University of Sussex in the United Kingdom. “We know they’re lovely, but ultimately, we wanted to know: How lovely are they?”
In other words, can you measure nature’s immediate effect on happiness—right this second?
To quantify the mood boost (or lack thereof) of being in nature, MacKerron built an iPhone app called Mappiness that randomly checks in with users twice a day to see what they’re up to and how they’re doing. Users report whether they’re with friends, at the movies, at work, getting ready for bed or doing any of the other countless activities that consume our waking hours. They also share how they feel at the moment by ranking their happiness on a sliding scale, ranging from “not at all” (i.e. hating the world) at one end to “extremely” (utter karmic bliss) at the other.
Around 20,000 people installed the app and provided more than 1.1 million data points over a period of six months. The app automatically paired responses with local weather data and GPS coordinates. A computer program classified those coordinates’ corresponding nature-y-ness using images taken from Google Earth. “The happiness measure is subjective, but everything else—the satellite classifiers, the data—was highly objective,” MacKerron says.
Nature did not disappoint. Even after controlling for variables like weather, day of the week, activities and company, natural environments provided significantly more moments of happiness than urban ones, MacKerron and his co-author report in the journal Global Environmental Change. On a scale of zero (least happy) to 100 (most happy), being in nature tended to add an extra three to six points to the baseline average of 66—a boost equivalent to the difference between doing housework and going to a museum. Coastal environments ranked highest of the natural settings, especially among women—along with woodlands and farms. Other activities that prompted a happiness boost of a similar magnitude included hanging out with a partner or friend, and exercising or playing sports. “The best thing is to be in trees with your friends,” MacKerron says.
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