“Hello, I had an appointment to pick up your tree.” He cheerfully rings the bell at a house on Gouwestraat in Amersfoort. After the resident has removed the tree from the backyard for him, Stef drags him to his bicycle. This one is not very heavy, because it has been under a roof. “Then they are very dry and therefore light,” the boy explains. But if the trees have been on the sidewalk for a long time, it becomes more difficult. “Then there is a lot of moisture in them due to the rain and they are very heavy.”