Madrid authorities are planning to cut down public trees in an area considered a World Heritage Site by UNESCO. The relationship of trees with humanity is almost as old as our culture, in the literal sense, because it begins with Genesis and the tree of good and evil and continues with Homer's Odyssey.

For Anne Frank, the German girl whose diary has become a symbol of the Holocaust, hope was a chestnut tree that could be seen from her window. In a beautiful story of a man who moves to a huge Caucasus elm, the Japanese cartoonist Jiro Taniguchi tells the story of the man who wants to avoid conflicts, but realizes it is barbaric.