Humans need fresh air because it cleanses the lungs and improves metabolic rate, blood pressure and heart rate, according to Pillars of Health. Fresh air also strengthens the immune system, soothes nerves, stimulates appetite and digestion, facilitates sleep, improves concentration, and clears the mind.
Fresh air refreshes and relaxes body and mind, leading to clear thought. Maryhill Manor notes that fresh air alters serotonin levels, leading to a sense of well-being. It also facilitates release of impurities from the body.
Proper ventilation results in fresh air in homes. Pillars of Health discourages smoking at home and encourages regular breathing exercises. Good posture, such as sitting straight, allows the lungs to take in enough fresh air. Natural air fresheners, such as essential oils, should be used in homes instead of artificial fragrances. Plants improve air quality by absorbing carbon dioxide and toxic pollutants and releasing oxygen. This is why plants should be placed in homes and workplaces.
Spending time outdoors also improves levels of oxygen in the body. Fresh air improves energy levels because sufficient oxygen is required for energy production. Air purifiers can be used in homes to remove air contaminants and prevent upper respiratory illnesses, such as asthma, allergy and colds. A polluted environment should be avoided to prevent health implications.