Development in Africa, Asia, and uptake in air conditioning will require more efficient buildings

As development increases in Africa and Asia, and the adoption of air conditioning grows around the globe, pressure on the building sector to continue to boost energy efficiency may grow.

While the building sector has made progress in recent years on energy efficiency, trends point to increased energy demand and carbon emissions, according to a recent UN report. “Dramatic action will be needed by governments, cities, and business if the global buildings and construction sector is to cut its carbon footprint in line with international agreements,” the report says. Since 2010, the energy used by cooling systems has increased by 25%, and with increased development in hot climates along with rising temperatures as the Earth warms, that growth will likely continue.

Buildings account for about 40% of the world’s greenhouse gas emissions and 36% of all energy consumption. In recent years, adoption of new techniques, products, and technologies, including heat pumps, better windows and insulation, energy-efficient appliances, renewable energy, and greener design, have led to stable emissions in the building sector.

But the greening of the construction industry needs to accelerate in order to meet climate goals, the report says.

New York City has two very large buildings dedicated to answering the 911 calls of its five boroughs. With more than 11 million emergency calls annually, it makes perfect sense. The second of these buildings, the Public Safety Answering Center II (PSAC II) is located on a nine-acre parcel of land in the Bronx. It’s an imposing 450,000 square-foot structure—a 240-foot-wide by 240-foot-tall cube. The gleaming aluminum cube risesthe equivalent of 24 stories from behind a grassy berm, projecting the unlikely impression that it might actually be floating. Like most visually striking structures, the building has drawn as much scorn as it has admiration.