We all take for granted the idea that being in nature makes us feel better. But if you were a skeptical scientist--or indeed any kind of skeptic--who wanted hard scientific evidence for this idea, where would you look? And how would that evidence be gathered?

It wasn't until Dr. Kathy Willis was asked to contribute to an international project looking for the societal benefits we gain from plants that she stumbled across a study that radically changed the way she saw the natural world. In the study there was clear proof that patients recovering from gall bladder operations recovered more quickly if they were looking at trees.

In fact, in the last decade there has been an explosion of "proof" that incredible things happen to our bodies and our minds when our senses interact with the natural world. In Good Nature, Kathy Willis takes the reader on a journey with her to dig out all the experiments around the world that are looking for this evidence--experiments made easier by the new kinds of data being collected from satellites and big-data biobanks. Having a vase of roses on your desk or a green wall in your office makes a measurable difference to your well-being; certain scents in room diffusers genuinely can boost your immune system; and, in a chapter that Kathy calls "Hidden Sense," we learn that touching organic soil has a significant effect on the healthiness of your microbiome.

What is remarkable about this book is how its revelations should be commonsense--schools should let children play in nature to improve their health and concentration; urban streets should have trees--and yet it reveals just how difficult it is to prove this to businesses and governments. As Kathy Willis says in her narrative, "We now know enough to self-prescribe in our homes, offices or working spaces, gardens, and when out walking. However small these individual actions might be, overall they have the potential to provide a large number of health benefits. And we need to be encouraging others to do the same. Nature is far more than just something that is useful for our health. It is not a dispensable commodity. It is an inherent part of us."