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.
Tea tree oil is said to be helpful in alleviating chest and head congestion, stuffy nose, and other symptoms of colds and flu. In aromatherapy, tea tree oil is said to be helpful in alleviating chest and head congestion, stuffy nose, and other symptoms of colds and flu, especially when used in steam inhalation.