CNN  — 

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.

On Earth Day, look through CNN Style’s round-up of 18 noteworthy green buildings from around the world.

Pixel Building (Melbourne, Australia)

The Pixel Building shows how "green" can be a multicolored affair.
The Pixel Building shows how "green" can be a multicolored affair.
Roger Wong/Moment Editorial/Flickr Vision/Getty Images

Opened: 2010 | Use: Offices | Design: Decibel Architecture