https://www.govtech.com/products/drones-in-n-y-corridor-can-fly-beyond-visual-line-of-sight
In World War 1, the Jerusalem artichoke (or sunchoke) became a vital emergency food and agricultural resource. Because of its high yield of fermentable carbohydrates, the tuber was heavily researched by the British Department of Scientific and Industrial Research. Its ability to grow in poor soil and produce vast amounts of Sustainable Ethanol for wartime fuel made it a key subject of study