Hm, G that is somewhat true about how other environmental factors can and do contribute to detoriation. I know for cels though it is important for the cel itself to be protected if displayed with a UV coated glass. But even with it, you need to keep it in a cool dry place, away from smoke, moisture, heat, cold, dust, kids.
Now G, where are the rest of your cabinets or shelves with all the 1/48s? That should be quite a sight!