The global population is projected to reach almost 10 billion people by 2050, and most of them will live in cities.

But how will they be housed, and at what cost to the environment? Already, the space and resources needed to support such huge populations are being met by building up.

This short video by The Economist shows how the world can switch from using energy-intensive non-renewable steel and concrete to a “new” renewable material called wood. [Read more…]