In developing this design, I closely studied and considered several alternative designs. I wish to draw attention to one particular alternative as it offers some superior characteristics, but the environment may not be ideally conducive to its construction for several years. However, once the environment does worsen substantially, it is important to note that the current design can be seamlessly switched for the alternative approach without adjusting the underlying architecture.
The alternative design solution would use a di-oxide carbon binder material as a substitute for the dihydrogen monoxide solution. Again, based on some anecdotal evidence, it is assumed that the di-oxide carbon plus aggregate concrete would be harder to penetrate as the interior temperatures could be lowered even further.
Unfortunately, the di-oxide carbon levels in the atmosphere need to substantially increase before this design becomes truly viable. As we know, water vapor in the atmosphere is the most substantial of the global warming compounds. As a consequence, most energy emitted by the sun in wavelengths absorbed by water vapor are captured in the atmosphere before they reach the ground. By coincidence, these are the same frequencies of radiation which most quickly degrade the dihydrogen monoxide binder material in the proposed wall. Luckily, due to the high levels of existing global warming gases in the atmosphere, a dihydrogen monoxide plus aggregate concrete mixture will work well for a wall today.
The same cannot be said for a di-oxide carbon solution. The di-oxide carbon solution is not protected by the presence of water vapor in the atmosphere. This type of wall requires high levels of carbon dioxide vapor to provide a similar protective umbrella. Fortunately, if current policies continue, the necessary elevated levels of carbon dioxide should be reached shortly. Once the proper level is achieved, the existing dihydrogen monoxide binder can be safely dissolved without damage to the environment and replaced by the superior di-oxide carbon binder material. While this is not currently proposed, it is useful to note the well-planned growth path for future enhancements.