Oxford: nature [mass noun] The phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations.
Where in nature, outside human creations, can I find an airliner, or even a fence? A beaver dam involves no human activity so is of nature. By stretching the definition only a little, one might consider a log cabin and other buildings that use natural materials to be of nature, or at least sympathetic -- wood, stone, earth based, but certainly not steel.
Once you distance yourself via fossil fuel, tools, rules of physics or chemistry and highly complex industrial manufacturing processes the claim becomes absurd. A 3d printer, airliner, drug production or an atomic clock cannot be part of nature -- they exist only through the confluence of man and fossil fuel.