What's Going on With Mouth Breathing?

When we breathe through the mouth, there is significantly less resistance versus so much longer takes me to breathe through my nose. There isn't really a lot of controversy between the people who have studied this. We know that nasal breathing is the optimum way to go. Twenty, five to fifty per cent of the population habitually breathes through through their mouths. But again, nobody really knewhow quickly these problems came on....