Lungs: How to Expand the Breathing Capacity
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Lungs and Breathing Exercise
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We breathe through our lungs and breathing system. They infuse our bodies with oxygen (inspiration or inhalation) and expel carbon dioxide (called expiration, or exhalation). Respiration is the process by which oxygen and carbon dioxide exchanged..

Air Pollution: How Does Affect Your Health?
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Air pollution is a well-known health risk. There’s no mistaking the smell of exhaust billowing across a busy highway or the smokestack plume rising from a city. Some air pollution is invisible, but its odor alerts you..