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
Air pollution, where severe, can cause serious health effects on a  population. If air pollution is severe, you can get eye irritation  and/or have trouble breathing. People â¦ who smoke or suffer from  respiratory problems (such as asthma, lung disease, bronchitis,  etc.) are more sensitive.ining causes dust and particles to get into the air. This will add to air pollution. In a coal mine emissions of methane that is helping to mine the coal is also a contributi â¦ ng factor to pollution.