Where do you get 1% that's wrong. Don't always believe everything you read there are always exception to the rules.

Well, plants, when you water them collect the in their soil and evaporate throughout the day making the area around them more humid along with filter the air and release oxygen. If you put a plant every so many feet you will feel an increase in oxygen and humidity in the room. It may not be as good as a actual green house but will get the job done. That;s just one example of how to do it. It's not impossible to increase the humidity to a comfortable level for ENS sufferers.