In 1966 Rolf Edberg wrote "This is mankind's home", "in the narrow borderland between the deathly heat beneath our feet and the coldness of space above us". He describes the fragility of our existence in poetic terms: "the atmospheric layer is so thin that it cannot be represented on any globe with even the finest brushstroke. At its thickest, it is only a few fractions of a millionth of the Earth's radius. This thin layer is what makes the difference between our planet and the sterile landscape of the moon." After reading that, one does feel the need to take better care of this fragile layer.