Definition: Sibilance is a sound characterized by pronouncing words with the letter 's'. In audio reproduction the letter 's' should sound clear and distinct, not smeared or distorted as in 'sh'.
High air pollution levels can cause immediate health problems including: Aggravated cardiovascular and respiratory illness; Added stress to heart and lungs, which must work harder to supply the body with oxygen; Damaged cells in the respiratory system
A new study from the University of British Columbia has revealed that inhaling air pollution during heavy exercise like biking could increase your risk of lung cancer, asthma, and stroke. The research showed that cycling or walking too fast actually causes people to breathe deeper, which results in more toxic air pollution coming into the lungs. According to the study, cyclists should ride between 7.5 and 12 mph, while pedestrians should walk between 1.2 and 3.7 mph, in order to inhale the least amount of pollution. Wearable fitness devices and certain apps both can help exercisers stay within those ranges.