In this digital world, every thing is no longer impossible not to be done and you can in fact do almost anything that if we look back in the Stone Age, many thought that it is very impossible and difficult to achieve. Just like the room temperature that you can regulate them at your desired coolness and humidity. There are some contraptions like humidor that can be use to control and maintain a certain humidity especially when you want to store something.
This is also important to some places where the altitude is high and the humidity is low. This device will counteract the effects of what high altitude brought on things and foods so the moisture content will be maintained. You can commonly see this in cigar stores and storage so to have and maintain a relative humidity to prevent the possibility of tobacco beetles from hatching. At the same time it can also prevent and slow the aging process of cigars.