" Why do you need to go outside? For one thing, to appreciate what it is that keeps you alive. And the more time you spend outside, the more you are able to sense change in that world. If you can smell something, chances are that unless it's flowers or food, it doesn't belong there and is not good for us. But even more profound, we have to get outside and seek nature because we need that connection for our physical and mental health. "

― David Suzuki , Letters to My Grandchildren