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.
1 This is the use of essential oils on hot compress, in diffusers, or in hot water for inhalation. Standard dose is 10 drops. * 2 Caution: prolonged inhalation of concentrated essential oils can cause headaches, vertigo, dizziness, nausea, and lethargy.  Benefits: Best for respiratory, sinus problems, and headaches.