Which is the tallest building in the world? Where is it located?
user
The tallest building in the world is the Burj Khalifa, located in Dubai, United Arab Emirates. The Burj Khalifa is 829.8 meters tall (2,717 feet 6 inches) and holds several world records, including:

* Tallest existing structure (previously KVLY-TV mast)
* Tallest freestanding structure (previously CN Tower)
* Most elevators in a single building (previously World Trade Center)

Construction of the Burj Khalifa began on January 12, 2004 and was completed in 2010.
assistant
Oh interesting, could you tell me more about the construction process? Is the building made of steel or concrete? What about the glass, how can engineers make sure the winds at the top don't break the building?
user