This is a imaginary, science-fiction proposal for a 1,500 mile wall that is rotated 90 degrees at its midpoint. It is 3D printed in bioconcrete from a fabrication satellite in geosynchronous orbit above the base of the wall. It absorbs CO2 and harmful pollutants that are immigrating into our atmosphere. It is also an antenna for alien intelligence.
The simple orthogonal rotation transforms the border wall from an infrastructural monument of nation-state boundaries to an active mediator between Earth and outer space... "the final frontier."
The purpose of this project is not to align with any particular agenda or vision of the future but simply to zoom out momentarily to the perspective of a true outsider.