The ancient city of Palmyra was irreparably destroyed by Isis in 2015. No amount of climate control would have protected it from the explosive charges that destroyed it.
Reburying sites like these will better protect them from deliberate damage and incidental damage from wars and such. Archaeologists deal with a timescale that often can’t assume political stability of the area where they dig stuff up. It’s better to not assume that future generations will pay the electric bill to keep the site preserved.
Also, I'm guessing that the sand encasing the site is a temperature/climate controlled structure when buried properly. No sunlight and no air, for starters.
Most regions have databases full of known sites that are unexcavated because there's never been a justification for digging.
So in programmer terms, most potential sites never make it out of the priority queue
Radar, X-ray, that sort of thing
And "geophysics" were used to decide what and where to dig in most of them. They're making new episodes now, as well.
> In some cases, resources (like money, staff and proper materials) are not available to properly maintain the site.