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
Quick Answer. Air pollution affects the environment by causing acid rain, reducing visibility, damaging plants and animals, and contributing to climate change. It has a negative effect on biodiversity and the survival of species. Air pollution is caused by both particulate and gaseous pollutants.