This month's Dezeen In Depth newsletter examines the environmental impact of glazed skyscrapers and features an interview with former Space10 head Kaave Pour. Subscribe to Dezeen In Depth today!

We acknowledge Aboriginal and Torres Strait Islander peoples as the First Australians and Traditional Custodians of the lands where we live, learn and work.

The twin towers of the World Trade Center, among the best known buildings in the world, represent only one step in the century-long evolution of skyscrapers in New York City. Here are some ...