The geographical problems in Toronto are pressing.

Natural change: Toronto's unique geographical conditions make it occupy a unique position. Toronto has four distinct seasons. Spring is short; Summer is hot and humid; In autumn, the sun is shining and the temperature is pleasant. At noon, the temperature sometimes rises to the level of summer. Winter is very cold, and this season lasts until mid-April.

Economic changes: 100 years ago, the hard manufacturing sectors such as automobile manufacturing and food manufacturing expanded rapidly, belonging to the traditional economy; Nowadays, Toronto is shifting to knowledge-based and innovative industrial sectors, and some competitive emerging industries have become the engines driving the urban economy.

Energy change: 100 years ago, the Canadian government encouraged enterprises to develop and utilize oil and gas resources, and the oil output increased greatly. Nowadays, the sustainable development strategy is implemented to encourage the development of alternative energy sources and energy conservation.

Population change: 100 years ago, Toronto had a small population; Today, Toronto is the capital of Ontario, Canada, with a population of over 4.3 million and an area of 632 square kilometers.

I hope I can help you, for reference only.