Scientific laws are considered established and universally applicable (to certain class of things or phenomenon under appropriate conditions) but not necessarily definitive. Also called laws of science.
Afflictions of the respiratory system include irritation and infection of the ears, nose and throat. Respiratory problems also may involve congestion, which can be decreased by inhaling rosemary (especially the verbenone type), hyssop (use var. decumbens only), tea tree, eucalyptus, lavender or peppermint.
Steam inhalation of essential oils can can provide a potent direct method. This is excellent for the inhalation of eucalyptus oils to treat coughs, as well as sinus and respiratory infections (except with children under the age of seven). Peppermint oil can be used the same way to treat fatigue or nausea.