Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The city of Toronto, Canada, covers an area of 630 km2 and is bounded by Lake Ontario to the south, Etobicoke Creek and Highway 427 to the west, Steeles Avenue to the north, and the Rouge River to the east. In addition to Etobicoke Creek and the Rouge River, the city is trisected by two minor rivers and their tributaries, the Humber River in the west end and the Don River just east of the central core; both flow southward to Lake Ontario at Humber Bay and Toronto Harbour respectively, which are part of the longer Waterfront. The concentration and protection of Toronto''s ravines allows for large tracts of densely forested valleys with recreational trails within the city. 17.5% of Toronto is covered with trees, a fairly high percentage within a large city in North America and there are ambitious proposals to double the coverage