“Into the forest” by Qing Li

This concise but beautifully illustrated book was originally published as “Shinrin-Yoku: the art and science of forest bathing” but now appears as “Into the forest: how trees can help you find health and happiness“. There is plenty of substance behind the pictures: Qing Li is regarded as the world’s leading expert on forest medicine, and was instrumental in providing a scientific basis for the benefits of Japanese shinrin-yoku or “forest bathing”.

Chapter 1 begins by explaining the origin of shinrin-yoku:

The term was invented in 1982 by the then Director General of the Agency of Agriculture, Forestry and Fisheries of Japan, Tomohide Akiyama, who stated that the people of Japan were in need of healing through nature. The idea was also part of a campaign to protect the forests. If people were encouraged to visit forests for their health, they would be more likely to want to protect and look after them.

At first it was a way of “selling” forest visits by invoking the common sense idea that they make people feel better. But Qing Li himself began assembling the evidence that these are real effects:

It was not until 2004 that scientific investigation of the link between forests and human health began in earnest. Together with various government agencies and academic organizations in Japan – and still feeling inspired by my experiences on Yakushima – I helped found the Forest Therapy Study Group, with the express aim of discovering what it is about trees that makes us feel so much better. The following year, I set off for Iiyama city, in the mountainous north-western corner of Nagano Prefecture, taking twelve healthy middle-aged businessmen from Tokyo with me for a three-day scientific forest-bathing trip. … It was in Iiyama that we first scientifically proved that forest-bathing can: boost the immune system; increase energy; decrease anxiety, depression and anger; reduce stress and bring about a state of relaxation

Some of these effects, like decreasing anxiety, are measured by the subjects filling in questionnaires before and after, but others, like the immune system state, are objective measures with blood tests. And the results are striking:

One of the ways we test the health of the immune system is by looking at the activity of our natural killer (NK) cells. Natural killer cells are a type of white blood cell and are so called because they can attack and kill unwanted cells, for example, those infected with a virus, or tumour cells. … In the first forest-bathing study I undertook in Iiyama, I found that after three days and two nights in the forest: NK cell activity went up from 17.3 per cent to 26.5 per cent – a 53.2 per cent increase. NK cell numbers went up from 440 to 661 – a 50 per cent increase. The presence of anti-cancer protein granulysin was up by 48 per cent.

How does this happen? Is it just a result of reducing anxiety etc? Well no, Qing Li then went on to identify the phytoncides as key agents. These are chemicals in tree sap which kill insects, bacteria and fungi which harm the trees, and are also released by trees to communicate. (See Peter Wohlleben’s book for much more on this.) Bottle phytoncides, put them in air fresheners, expose Japanese business men in hotel rooms to the chemicals, and there are measurable improvements in the state of their immune systems. Not as much as walking in a forest, but it shows that phytoncides are part of the picture. There are some clues about other components: inhaling (or even injecting!) some forest bacteria have a positive effect on people’s state of mind.

With the scientific basis outlined in the first chapter, Qing Li moves on to how you can benefit from shinrin-yoku yourself.

Make sure you have left your phone and camera behind. You are going to be walking aimlessly and slowly. You don’t need any devices. Let your body be your guide. Listen to where it wants to take you. Follow your nose. And take your time. It doesn’t matter if you don’t get anywhere. You are not going anywhere. You are savouring the sounds, smells and sights of nature and letting the forest in. … Listen to the birds singing and the breeze rustling in the leaves of the trees. Look at the different greens of the trees and the sunlight filtering through the branches. Smell the fragrance of the forest and breathe in the natural aromatherapy of phytoncides. Taste the freshness of the air as you take deep breaths. Place your hands on the trunk of a tree. Dip your fingers or toes in a stream. Lie on the ground. Drink in the flavour of the forest and release your sense of joy and calm. This is your sixth sense, a state of mind. Now you have connected with nature. You have crossed the bridge to happiness.

There’s also a chapter about introducing shinrin-yoku ideas into your home, although I found that the weakest section of the book. But perhaps I’m just biased towards experiencing woodlands themselves. (It’s even worse than that, as I’m writing this as the UK is lockdown for COVID-19, and Britain’s rich inheritance of woods and forests feel far away.)

In the final chapter we move on to the future.

Forest-bathing is now a standard practice in Japan. There are sixty-two forest bases and roads across the country, all designated healing forests and each with a particular healing feature. In Kunigami, in tropical northern Okinawa, you can feel the yanbaru-no-mori, the subtropical natural environment, on your skin. In Chizu, Tottori, flows one of the best streams in Japan. Akasawa has the intense special fragrance of the hinoki trees. Experts in forests and health care are on hand in many of our bases to help you to connect with nature through all five of your senses and to make the most of its restorative powers. In some of our forest bases, you can be accompanied by a doctor as you walk or have your blood pressure checked in cabins along the trail.

But of course this is all under threat where woodland and forest are under threat, and so Qing Li believes that forests have a special place and their destruction posts a special danger:

Our health and the health of the forest go hand in hand. When trees die, we die. If our forests are unhealthy, then so are we. You can’t have a healthy population without healthy forests.

How can we achieve this? This brings us back to the beginning when the forestry agency promoted the idea of shinrin-yoku to increase people’s involvement with forests:

The key to preserving our forest, wherever it is, is to maintain our connection with it … When we feel connected to nature, we want to look after it. … We will benefit not just from the clean air and water forests provide, the carbon they store, the species they maintain, but also from the peace and quiet they offer, their beauty and vital spirit, and the myriad benefits to our well-being they hold within them.

And how to make this change in society sustainable, generation upon generation? By introducing our children to the forest of course.

A growing body of evidence shows that being in nature when we are young creates a sense of connection with the natural world that lasts as we grow up. Children who have fun in nature will become adults who care for and protect it and understand its importance. If we let our children play outside now, they will become the green architects of the future, the green city-planners and tree-mappers, the gardeners, nature therapists and forest-medicine doctors!

When you think about it, children’s stories, books, and imaginations are full of forests. Not just traditional fairy tales, but even the Gruffalo lives in a deep dark wood. I believe this is because people are instinctively connected to woodland. The environments in which we evolved in Africa are wooded: either forests or savannah scattered with patches of acacia trees. Most of us have stayed in regions with forest, and it is only relatively recently that humans started to colonise treeless landscapes: deserts, steppes, frozen wastes, and cities.

“Thirty years in wilderness wood” by Chris Yarrow

“Thirty years in wildness wood” is the long story of the Yarrow family’s purchase of a 63 acre woodland, how they lived in it, managed it, and made a living from it. The book has strong parallels with “A wood of our own” by Julian Evans: both Evans and Chris Yarrow are trained foresters, buying woodlands privately and then managing them for decades, improving the mix of species with long term objectives in mind. Their stories are set against the same backdrop of English forestry in the last few decades, and both had to deal with the aftermath of the Great Storm of 1987. But Yarrow’s project was more ambitious: to use the woodland as a primary source of income,  and to demonstrate the idea of multipurpose forestry by harvesting wood and timber, producing and selling wood products on site,  and admitting a paying public.

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Regulating wet firewood

Woodfuel has been in the news the last few days following the government’s announcement about restrictions on selling firewood to domestic users in England. What they’re trying to do is worthwhile, but the proposals raise some issues for owners of small woodlands. I believe there need to be exemptions for people selling less than about 50 cubic metres of firewood per year. Otherwise the regulations will inhibit small woodlands’ role in fighting climate change and attempts to bring half of England’s native woodlands back into management.

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“The hidden life of trees” by Peter Wohlleben

Wohlleben’s book was originally published in German in 2015 and then translated and published in English in 2016. The book attracted a lot of mainstream interest due to Wohlleben’s “wood wide web” description of trees communicating with each other and sharing nutrients. I was aware of this at the time and I must admit the way he presented it all put me off. But I’ve now read the book and that’s only a small part of the wide range of topics he covers.

Peter Wohlleben began his career as a forester for the state of Rhineland-Palatinate in Germany but became disillusioned with the “big forestry” style of management and began managing a beechwood for the local council of Hummel. He published several successful books about forests, nature, and threats to the environment, before “The hidden life of trees”.

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“A wood of our own” by Julian Evans

I read “A wood of our own” by Julian Evans before I bought Century Wood, way back in 2007. I was already pretty sure I wanted to own a woodland, and Evans’ book helped confirm it. It’s become the book I compare other woodland owners’ books against, and I’ve looked through it again after reading and reviewing “A wood of one’s own” by Ruth Pavey.

Back in 2007 I had already read Evans’ book “Badgers, beeches, and blisters”, which is out of print but still available as a free PDF from woodlands.co.uk. That is very much a How To book with a lot of practical advice. At the same time as “A wood of our own”, I bought Chris Starr’s “Woodland management: a practical guide” and Ken Broad’s “Caring for small woods”. Both of these are more formal (very formal in Starr’s case: it’s a textbook) How To books in the vein of “Badgers, beeches, and blisters”, whereas “A wood of our own” is autobiographical. A first person account of Evans and his wife and her brother purchasing and managing the wood.

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“A wood of one’s own” by Ruth Pavey

“A wood of one’s own” by Ruth Pavey has been out for a couple of years but I’ve only got round to reading it this month. For me, it was a bit of curate’s egg. It’s well written (there are gushing reviews in the press) but the content was rather disappointing: the gardening correspondent of the local paper in Highgate and Hampstead buys a 4 acre wood in Somerset, and uses it for gardening. Maybe that is too harsh. It’s really an orchard after all, and Pavey has a lot of awareness of what is going to set people’s teeth on edge: planting garden flowers in woodland, for instance.

Pavey has family and childhood connections to Somerset, and so it was not entirely surprising that in 1999 she ended up buying her four acres there. Mixed scrub, orchard, some big trees, and lots of brambles and nettles.

Continue reading ““A wood of one’s own” by Ruth Pavey”