The poor sods who moved to the city were shown to have far worse mental health in the year following the move. They did return to their pre-move health status after that but never showed an improvement in their mental health.
In a more urban environment, we are constantly bombarded with stimulation; you can't zone out as easily as you can in nature. And there is something incredibly nourishing about being present in nature.
Other studies have shown that exposure to nature increases our feelings of vitality, which subsequently generates more energy and strengthens our immune system.
People who work outdoors always seem to have more of a spring in their step and a certain enthusiasm for life, beyond what you see in office workers.
I was at a party the other night and spoke to a number of farmers. Geez, what an awesome and happy bunch of people they are (or maybe it was the cocktails!).
A psychologist (Richard Ryan) who studies the impact of nature on our health has said that "nature is fuel for the soul ... often when we feel depleted we reach for a cup of coffee, but research suggests a better way to get energised is to connect with nature."
Apparently just imagining being in nature (eg imagining yourself outdoors or recalling previous outdoor activities) has been shown to increase serotonin levels (feel-good brain chemical), which puts you in a better mood and gives you more energy.
And just the presence of nature, such as an indoor plant, created similar changes in mood and energy.
So figure out if you are suffering from "nature deficit disorder", because this is likely to be having a huge impact on your mood and energy levels.
Get yourself down to a garden centre, buy yourself a plant and stick it on your desk, in the car or kitchen, wherever you spend most of your time.
Then, in your breaks or spare time, go and find some nature and rub yourself in it - it's good for you.
-A registered psychologist with a masters in applied psychology, Wanganui mother-of-two Kristen Hamling is studying for a PhD in positive psychology at Auckland University of Technology.