The following information is available about this work:
- the numbers in the title refer to the time period taken into consideration: from March 30th 2008 till April 14th 2011
- Data are from ARPA Lombardia
- Legend of colours:
PM10, black; PM2.5, light blue; nitrogen dioxide, red; sulphur dioxide, light grey; benzene, green;
carbon monoxide, yellow; ozone, dark blue.
The museum is investigating.
