Our general strategy is to take advantage of all shafts and the underground tunnel to create a cooling system to produce cold wind. We will build a wind catcher above the shaft, its function is to catch warm wind from the height, and then cool it through the filtration system, as well as the whole underground tunnel, which acts as a natural refrigerator to cool the wind and send it to all other shafts. The main material will be earth brick made of local Austin Chalk compression, which is environmentally friendly. Maybe after 50 to 70 years, the bricks will crack, and then we can knock the tower down and rebuild it. It will be a circular process.