Salt therapy (Halotherapy) is big in Europe. You can mimic this by boiling a large pot of water with 1 cup sea salt, remove from stove and place your face about 3 inches from pot edge, cover head with towel and let vapors go into your breathing pattern.
The salt therapy was found to have beneficial effects in the treatment of:
Asthma and Chronic Bronchitis
COPD (Chronic Obstructive Pulmonary Disease)
Various acute or chronic respiratory disease
Promotes better sleep