Siilinjärvi
Siilinjärvi () is a municipality of Finland. It is located in Northern Savonia, north of the city of Kuopio, which largely surrounds Siilinjärvi. Another neighbour municipality with Kuopio is Lapinlahti. The name, in Finnish, apparently translates literally as "Hedgehog's Lake", although its etymology actually stems from a Sámi word meaning "winter dwelling". Lakes are essential part of the geography of Siilinjärvi. There are 123 lakes, and the biggest of them are Kallavesi and Juurusvesi–Akonvesi. Water area is 106.85 km2, which is 21% of the whole area of Siilinjärvi. The median age is relatively low; 23% of the population are under 15 years old. Siilinjärvi has eleven elementary schools and two secondary schools (one is located in Suininlahti and one downtown). The Kuopio Airport is located in the village of Rissala in Siilinjärvi along the Highway 9. The airport is also the home of the Karelian Air Command and the 31st Squadron of the Finnish Air Force. Siilinjärvi is the birthplace of politician and former prime minister of Finland and European Commissioner Jyrki Katainen. Economy The main sources of income are services and industry. One of the most important employers in Siilinjärvi is Siilinjärvi apatite mine owned by Yara International. The