Why is Cleveland, Ohio called the "Forest City"?

Cleveland, Ohio is called the "Forest City" because of the high amount of trees in the city.

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The "Forest City" nickname for Cleveland goes back to the 1800s, not all that long after the section of Cleveland located west of the Cuyahoga River was first settled by people of European extraction (starting in 1805, with the Treaty of Fort Industry between the US and the resident Native American tribes; the eastern section had been settled starting in 1795). Because of the recent settlement, it's probably true that the city was given the nickname because it still contained lots of trees. Wikipedia says that the nickname was coined around the time that the Frenchman Alexis de Tocqueville toured the US (including Cleveland) in the 1830s and notes that the "Forest City Hook and Ladder" volunteer firefighting company was chartered in Cleveland in 1834, although subsequent possible sources for the name were also cited. Later, the Cleveland baseball team that was a founding member of the National Association of Professional Base Ball Players in 1871 was called the Forest Citys (not the "Cleveland Forest Citys" as current reference books list the name). So the "Forest City" nickname for Cleveland appears to have been common throughout the 19th century.
https://en.wikipedia.org/wiki/The_Forest_City
https://en.wikipedia.org/wiki/Cleveland_Forest_Citys
https://en.wikipedia.org/wiki/Treaty_of_Fort_Industry