Breathing is the process by which oxygen from the air enters the lungs and is carried into the body's bloodstream. Diseases of the respiratory system are mild or serious: colds, sinusitis, sore throat, bronchitis, pneumonia, asthma and allergies, etc. Air pollution is responsible for many of these diseases. Breathing quality air and using natural formulas according to one's needs, such as echinacea or bee propolis, can help support the respiratory system.