The document provides information about Chicago, Illinois, including its:
1. Climate, which has very hot summers and cold winters, with Lake Michigan moderating temperatures.
2. History as an important trading center established by Jean Baptiste Point DuSable in the late 18th century.
3. Demographics, with a population of over 2.8 million people in 2007 and diversity including large black and Hispanic populations.
![1. Environmental Factors ,[object Object],[object Object],[object Object],Month Minimum Temp. Maximum Temp. January -6 ̊C -1 ̊C February -7 ̊C 1 ̊C March -1 ̊C 8 ̊C April 4 ̊C 15 ̊C May 10 ̊C 21 ̊C June 16 ̊C 27 ̊C July 19 ̊C 29 ̊C August 18 ̊C 28 ̊C September 14 ̊C 24 ̊C October 7 ̊C 18 ̊C November 1 ̊C 9 ̊C December 2 ̊C -6 ̊C](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)