When you talk about megascale projects like this one, it's good to use the unit of Gigaton. Humanity produces 5 substances in the gigatons per year: coal (8 GT

When you talk about megascale projects like this one, it's good to use the unit of Gigaton. Humanity produces 5 substances in the gigatons per year: coal (8 GT/y), oil, natural gas, concrete (about 4 GT/y each) and steel (2 GT/y). Everything else (in order, plastics, fertilizers, ammonia) are less than 0.5 GT/y. This project is supposed to be 200 meters wide, and 500 meters tall. If on average from the width of 200 meters, only 2 meters are concrete, then each kilometer of this project will have a volume of 1 cubic kilometer. Concrete has a density of about 2.2 tons/m3, so each kilometer of this structure will use 2.2 GT of concrete. Each mile will consume roughly the entire global annual production of concrete. If you build one mile per year, it will take 105 years to build the project. If you want to finish the project in just 25 years, you need to continuously use 4 times more concrete than the world currently produces.