1 How did alleys help people in the heat?
2 Why were homes made of a variety of
different building materials in the past?
3 How did wealthy homeowners keep their
houses cool?
4 What is the main building material used
today?
5 What did the designers of Burj Al Arab and
Burj Khalifa try to do?
6 What do architects believe are the
advantages of skyscrapers?
7 What does ‘walkable’ mean in this article?