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 can create some major health problems. Highly polluted air has been shown to cause a burning effect in eyes, noses and throats. Polluted air also makes it harder for those with asthma to breathe. Some toxic chemicals that can live in the air -- like benzene and vinyl chloride -- are highly toxic.ut all of those hours spent outside were actually good for more than using up our unlimited, childhood energy. As it turns out, science shows that some fresh air really will do you good. Fresh air saves lives.