18 examples of sustainable architecture around the world - Green buildings.

There are a lot of ways to size up buildings, whether by measuring their height, comparing styles of architecture or dissecting their histories. But in the era of climate change, more and more emphasis is being placed on a building's "green" credentials, as environmental impact leads decisions around design, construction and operations. Look through CNN Style's round-up of 18 noteworthy green buildings from around the world.