The atmosphere is a complex dynamic natural gaseous system that is essential to support life on planet Earth. Stratosphericozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth's ecosystems.
Indoor air pollution (see Airlog) and urban air quality are listed as two of the World’s Worst Toxic Pollution Problems in the 2008 Blacksmith Institute World's Worst Polluted Places report.
Kraków (Polish pronunciation: [ˈkrakuf] ( listen)) alsoCracow, orKrakow (English /ˈkrækaʊ/), is the second largest and one of the oldest cities in Poland. Situated on the Vistula River (Polish: Wisła) in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life and is one of Poland's most important economic hubs. It was the capital of Poland from 1038 to 1569; the Polish–Lithuanian Commonwealth from 1569 to 1596; the Grand Duchy of Kraków from 1846 to 1918; and Kraków Voivodeship from the 14th century to 1999. It is now the capital of the Lesser Poland Voivodeship.