Green zones or green infrastructure, includes public parks, nature reserves, urban agriculture and street trees. All areas river banks is considered a green zone in Pretoria.
The World Health orginitation recommends that an area of 9 m2 of green space be available per person. A Denmark study have shown that spending time in nature during childhood can lower the risk for many psychiatric disorders. Other studies have shown that 5 minutes in nature has shown to have a positive effect on ones health i.e. blood pressure, heart rate etc.
Therfore, if you are feeling down, go ouside and find a geocache.
Please replace cache exactly as found