Playing with fire there. It'll burn you one day.
Rejecting Genesis as history has logical consequences that you won't like. You're only inches away from theistic evolution and from there the denial that Jesus was the Creator. Sounds like hyperbole but it isn't, I promise. It's best to put your trust in God's word, as written, and let the chips fall where they may.
The canopy theory has been falsified for something like twenty years. You should drop it entirely. No way human beings survive the atmospheric pressure that would be created, for one thing. That alone is sufficient to falsify it but there are quite a lot of problems with it. It's a relic from the 80's (maybe earlier) that I wish people would just forget about.
The bible does indicate that and the hydroplate theory explains this quite well. It also accounts for the changes in human lifespan. If you thought the canopy theory was good, you need to read up on the hydroplate theory. It is superior in every possible way.
From "
Vapor Canopy and the Hydroplate Theory"...
* Decrease in Human (and other) Lifespans: Another major argument for the vapor canopy has been the longer lifespans of the antediluvians, of people and of other organisms. Hydroplate Theory events may explain even better than the Canopy Theory why people, plants, animals, and insects may not live as long today as they did prior to the flood. Since the flood the Earth's crust has been loaded with radioactive (unstable) elements. Radioactive decay is dangerous to biological organisms for it not only harms the individual but degrades the functionality of the overall genome of an entire species. Today, multiple mutations occur with every single cell division, trillions of times over within, for example, a human body. See
rsr.org/radioactivity and
rsr.org/uranium for an introduction to the Hydroplate Theory's explanation for the origin of Earth's radioactivity. If the reduction of atmospheric pressure and reduced oxygen content were the primary reason for decreased health and lifespan, the consequences might have been seen in a more immediate drop (to current levels). Instead, charting the reduced lifespans shows an exponential decay over a few centuries which seems to fit better with the gradual deterioration of the genome that took the edge off the extraordinary precision biology that had continued to function in the post-Fall world. (See
rsr.org/genetic-entropy,
rsr.org/evidence#abrahams-marriage, and consider that relatively great longevity persisted till the flood even without the help of the leaves and fruit of the Tree of Life). So rather than a decrease in atmospheric pressure, the flood's origin of Earth's radioactivity explains better mankind's decreasing biological lifespan.
Clete