This document provides an overview of developments in architecture in 2015, with a focus on sustainable design. It discusses major architectural projects from 2014 and cultural events influencing design. It also profiles organizations promoting sustainable urban planning and fairs highlighting green building techniques. Examples are given of architectural firms designing large-scale, eco-friendly projects, such as Foster + Partners' plans for Mexico City's new international airport, aimed to be the world's largest and most sustainable airport through its single lightweight shell design. The document outlines ongoing efforts to advance sustainable architecture through conferences, competitions and recognition programs.