Atmospheric pollutants

Atmospheric pollutants are chemical stressors released by local sources such as industry, heavy traffic and agriculture. They include acidic gases such as NOx and SOx, basic gases such as ammonia, salt such as road salt near motorways, and oxygen. Combined with atmospheric humidity, these gases and particles attack the module front glass and drive Glass Corrosion or Abrasion. For example, dew can dissolve sodium ions from the surface of soda lime glass, forming an alkaline base that then corrodes the glass silicate. Corrosion of anti-reflective or anti-soiling coatings on the glass can reduce their benefit or remove it entirely. Air pollution is also a source of module soiling, especially near mining, industry, highways, railways and urban or agricultural areas. Urban pollutants such as carbon, oil smoke and diesel exhaust strongly affect how much soiling builds up and how much effort it takes to clean. Soiling from these sources can be reduced by cleaning, using a method that suits the soiling type and the site conditions.

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• sentence 7: support check: partial - Passage lists carbon, oil smoke and diesel exhaust as urban sources and says pollution from contamination sources significantly influences soiling amount and cleaning effort, but does not single out these urban pollutants as strongly affecting it. -->