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
Breathing in particle pollution can be harmful to your health. Coarse (bigger) particles, called PM 10, can irritate your eyes, nose, and throat. Dust from roads, farms, dry riverbeds, construction sites, and mines are types of PM 10.article pollution â also called particulate matter (PM) â is made up of particles (tiny pieces) of solids or liquids that are in the air. These particles may include: 1  Dust. 2  Dirt.