how much do they charge?
10–20 SEK
Stockholm
10–20 SEK 
who is broder knudtzon? A Norwegian merchant, politician and benefactor. when did he engage with politics? 1814 and how did he do that? He became foreign correspondent of his father's firm Hans Knudtzon & Co, which he owned together with his brother Christian and his brother-in-law Lorentz Johannsen. who is lorentz? A Norwegian merchant and member of the Norwegian Parliament. what does norwegian mean? UNANSWERABLE what was broder merchant of? UNANSWERABLE when did he start mercantile? On his return from Stockholm, he became foreign correspondent of his father's firm Hans Knudtzon & Co where is the place location where he returned from? Stockholm is the capital and most populous urban area of Sweden how is the air quality of the area? Used to have problematic levels of particulates (PM10) due to studded winter tires, but as of 2016 the levels are below limits, after street-specific bans. does the area charges for congestion? Stockholm has a congestion pricing system, Stockholm congestion tax.
wiki:25684689
Stockholm [SEP] Congestion charges
Stockholm has a congestion pricing system, Stockholm congestion tax, in use on a permanent basis since 1 August 2007, after having had a seven-month trial period in the first half of 2006. The City Centre is within the congestion tax zone. All the entrances and exits of this area have unmanned control points operating with automatic number plate recognition. All vehicles entering or exiting the congestion tax affected area, with a few exceptions, have to pay 10–20 SEK (1.09–2.18 EUR, 1.49–2.98 USD) depending on the time of day between 06:30 and 18:29. The maximum tax amount per vehicle per day is 60 SEK (6.53 EUR, ).