I spotted this article in the Frankfurter Allgemeine as I sat in a cafe in St Christopher's Place at the weekend.
It got me thinking about why we find trees such a delightful thing and why when we talk about things Eco we automatically think of trees. Well yes they are renewable - and make good fuels and houses - but perhaps there is something else. In the article on faz.net http://www.faz.net/s/Rub8E0FC0CD826A4ACA80504FD9153A70F2/Doc~E4031FF2D2EDF407DA3AA7652705FB10D~ATpl~Ecommon~Scontent.html
Wolfgang says that he can think in his tree house. Its designed by a talented design designer Andreas Venning whose company - from their website - seem to specialise in tree houses. http://www.baumraum.de/