The world is currently undergoing the largest wave of urban growth in human history. More than half of the global population is now concentrated in urban areas, and by 2060 two thirds of the expected population of 10 billion will live in cities.
To accommodate this tremendous growth, we expect to add 2.48 trillion square feet (230 billion m2) of new floor area to the global building stock, doubling it by 2060. This is the equivalent of adding an entire New York City every month for 40 years. This new building stock must be designed to meet zero-net-carbon standards.