Yes this is the answer – National Geographic January 2016 – This Is Your Brain on Nature – When we get closer to nature—be it untouched wilderness or a backyard tree—we do our overstressed brains a favor.

“When we slow down, stop the busywork, and take in beautiful natural surroundings, not only do we feel restored, but our mental performance improves too. [David] Strayer  [cognitive psychologist at the University of Utah] has demonstrated as much with a group of Outward Bound participants, who performed 50 percent better on creative problem-solving tasks after three days of wilderness backpacking. The three-day effect, he says, is a kind of cleaning of the mental windshield that occurs when we’ve been immersed in nature long enough. On this trip he’s hoping to catch it in action, by hooking his students—and me—to a portable EEG, a device that records brain waves.”