The solutions to climate change are already at our fingertips

To keep global temperature rise below 2 degrees Celsius of warming, the International Energy Agency (IEA) reports that the global buildings sector will need to decrease its total annual greenhouse gas contribution by 77% by 2050.

October 04, 2017 |
University of Kansas Capitol Federal Hall

University of Kansas Capitol Federal Hall. Photo: Garrett Rowland.

Climate change is the environmental challenge of our time, and one of the most pressing issues facing our cities and communities today. Because every project we work on is either part of the problem or part of the solution, we have made a commitment to measure the environmental impact of our work, and publish the results annually to drive discussions with peers and partners, clients, and communities about the best ways to make progress in the future. This is the focus of our Impact by Design 2017 report, published earlier this week.

Our commitment to transparency and leading conversations around the connection between climate change and the built environment began with our first Impact Through Design report in 2016, which we published after sending a team to Paris to observe the U.N. negotiations resulting in the Paris Agreement. Gensler was one of the 1,300 businesses, governments and civil society organizations to sign the Paris Pledge for Action last year, expressing our commitment to limiting climate change to less than 2 degrees Celsius of warming. This built on our continued participation in the Architecture 2030 Commitment, an initiative focused on collective action by the architecture and design industry to reduce the carbon impact of the built environment.

In 2017, we extend these commitments as a proud sponsor of Climate Week NYC, which coincides with the opening session of this year’s U.N. General Assembly. Climate change affects every business, government, and community around the world. We take our commitment to sustainability very seriously, and we hope our Impact by Design publications can inform discussion around how the architecture and design community can make a difference, and where our efforts are making the greatest impact today.


Buildings have a huge environmental impact that can’t be ignored.

According to the U.S. Energy Information Agency (EIA), buildings consume nearly 48% of all the energy produced in the United States. The buildings sector is the largest global consumer of energy, which includes accounting for approximately half of all global electricity consumption. As of today, buildings are projected to increase their energy consumption by 1.5% each year between now and 2040.

To keep global temperature rise below 2 degrees Celsius of warming, the International Energy Agency (IEA) reports that the global buildings sector will need to decrease its total annual greenhouse gas contribution by 77% by 2050. The scale of this challenge is significant, but not insurmountable. Two mutually reinforcing solutions will help us move the needle: first, we need to improve the energy efficiency of our buildings to limit any increase in energy demand; second, we need to incorporate more renewable resources and clean energy strategies into our projects.

There’s a lot of work to do, but we also recognize the progress that we and the design industry as a whole have made. We are proud that the 700+ million square feet of new buildings and 260+ million square feet of new interiors Gensler designed in 2016 are estimated to save over 16 billion kilowatt-hours of electricity each year. According to the U.S. Environmental Protection Agency (EPA), this figure represents an estimated 11 million metric tons of CO2 that will not be emitted into the atmosphere every year based on sustainable improvements to the built environment. These figures are encouraging, but as we look to the future targets set by the Paris Agreement and Architecture 2030 Challenge (which seeks an overall 80% reduction in building energy use by 2020), we know there is still significant improvement to be made.

The design industry must continue to work closely with our peers in engineering and construction to bring the global built environment’s carbon footprint down, and pursue partnerships outside the industry to extend our influence—we cannot meet our emissions reductions goals alone. For example, improvements in battery technology, market maturation and cost reductions for renewables, and new policy innovations will be needed to create a cleaner electrical grid. Together, we can ensure that the cities of tomorrow are filled with resilient, high performance buildings that will serve as the platforms for the sustainable economy of the future.


The Tower at PNC Plaza. Photo: Connie Zhou.


Cities are the future of sustainability

Economic growth, urbanization, energy consumption, and greenhouse gas emissions tend to move in tandem—we have historically paid for greater prosperity and urban growth with increased carbon and greenhouse gas emissions. Decoupling these forces of growth to find solutions that accommodate future economic and urban success is our challenge, and the stage on which architects and designers can make our greatest impact. Recent data suggests cause for optimism—greenhouse gas emissions have fallen or stayed flat during the last three consecutive years of economic growth, according to the International Energy Association (IEA).

We must work to ensure this trend continues. The time to act is now, and the place for action is in the cities and urban areas which people flock to. The U.N. projects that there will be an additional 2 billion new urban residents living in our global cities by the year 2050, the continuation of the greatest period of urbanization in human history. This trend represents the continued concentration of our economic and environmental impact—cities currently account for 80% of global economic output and 70% of global CO2 emissions while representing just 2% of global landmass.

Put another way, cities are both where the problem lays and a big part of the answer, largely due to the greater energy and emissions efficiency of an urban lifestyle. The International Institute for Environment and Development (IIED) found that the per capita greenhouse gas emissions of city dwellers are generally smaller than national averages based on data from cities in Asia, Latin America, North America and Europe. The same study found that the average emissions attributed to residents of New York City are less than a third of the U.S. national average, while residents of Barcelona and London have a carbon footprint that is half the national average of Spain and the U.K.

Thoughtful, environmentally focused design can further the sustainable impact of urban living. Cities like Stockholm, Boston, Zurich and Vienna are filled with sustainably minded features like public transportation, bike lanes and mixed-use development that keep their resident’s per capita carbon contributions down. Innovative technologies such as eco-districts, microgrids, and net metering will also make a big difference as we seek to create the decentralized, resilient and clean energy infrastructures needed to dramatically improve sustainability at the urban scale moving forward.

With billions or even trillions of square feet needing to be built in global cities between now and 2050, the role of municipal governments and policy decisions in the shape of that future cannot be understated. Strong building codes and incentive programs implemented by city governments around the world are a significant driver of both adoption and innovation of sustainable building technologies and solutions. It will take leadership at the city level, paired with a commitment to implementing innovative new energy sharing solutions at the scale of buildings and communities, to help bring these solutions to scale.


The Westin Denver International Airport Hotel & Transit Center. Photo: Scott Frances.

Every project should be a step forward

If there is one thing that we hope to demonstrate in this year’s Impact by Design 2017 report, it is the sheer scale of the environmental impact one building can make. In the coming years, we will continue to build new cities and expand current ones at an unprecedented pace—but that expansion will not come wholesale. It will be realized as the result of millions of individual decisions that we and our partners in the design, construction, and real estate industries make every day as we build the cities of tomorrow.

To put the impact of individual decisions in context, we estimated the metric tons of CO2 saved by the sustainable performance of our projects. For example, The Tower at PNC Plaza in Pittsburg alone saves an estimated 7,000+ metric tons of CO2 every year based on the efficiency of its design and operations. It would take burning more than 200,000 barrels of oil to put that amount of carbon into the atmosphere according to equivalency calculations from the US Environmental Protection Agency (EPA).

But energy efficiency is just one piece of the puzzle. It is also important to understand the energy it takes to manufacture, transport and dispose of common building materials. Taken together, iron and steel production are responsible for 31% of industrial CO2 emissions every year. Concrete is the second most consumed substance on earth after water, and its production is responsible for 8.6% of global greenhouse gas emissions each year. The use and disposal of these materials makes up a building’s embodied energy footprint, and this is one of the reasons why recycling unused building materials and construction waste is so important.

The Westin Hotel & Transit Center at the Denver International Airport confronted the challenge of waste disposal head on, offsetting a massive amount of greenhouse gas emissions through diverting construction waste from landfills. 10,135 tons of diverted construction waste is estimated to save almost 18,000 metric tons of CO2 from being emitted according to the EPAs WARM model—equivalent to the annual emissions of 3,794 passenger cars.


Where do we go from here?

At Gensler, we see design as the means toward achieving a larger purpose—making the world a better place and making a positive difference for our clients, communities, and every person who experiences or is affected by the projects we design. Great design is all about coming up with elegant answers to complex problems, and delivering solutions that make a real and positive impact on people’s lives.

Climate change is a difficult challenge, but one we have the capacity to solve. We are seeing important progress being made all over the world, and this is the animating theme of the Climate Optimist campaign announced this week during Climate Week. People are faced with negative endless headlines on this issue; to act we all need to believe that we have the capacity to solve this challenge. At Gensler, we want to be a big part of the solution, and we believe that the architecture and design industry can be a driving force of positive change as we seek a more sustainable future.

We hope that the ideas and projects highlighted in our Impact by Design 2017 report will spur discussions about the role the built environment has on the long-term health of people and the planet. We will continue to seek innovative ways to understand and quantify the impact of our work on the environment, and will use that knowledge as we continue to seek even higher levels of performance from the projects we design and deliver every day.


Diane Hoskins is one of two Gensler Co-CEOs. She is focused on Gensler’s global talent strategies, performance and organizational development to ensure that we serve our clients with the world’s top talent. The catalyst for Gensler’s Research program, Diane is committed to delivering value to clients through strategies and innovations like Gensler’s Workplace Performance Index® (WPI).

GenslerOn | Gensler

Published by Gensler, a global design firm with 5,000 practitioners networked across five continents, GenslerOn features insights and opinions of architects and designers on how design innovation makes cities more livable, work smarter, and leisure more engaging. Our contributors write about projects of every scale, from refreshing a retailer’s brand to planning a new urban district, all the while explaining how great design can optimize business performance and human potential. For more blog posts, visit:

Related Blogs

District Winery, one of DC’s latest waterfront amenities

District Winery, one of DC’s latest waterfront amenities. Image © Prakash Patel

December 01, 2017 | Architects | GenslerBrenden Jackson

The nature of waterfront redevelopment has been evolutionary, in the truest sense of the word.

October 30, 2017 | Architects | GenslerJoe Pobiner

What do we think the future will look like 30 years or so from now? And what will City: 2050 be li...

A newly developed waterfront space in London

London is creating and redeveloping spaces with strong cultural offerings. Image © Mike Stezycki.

September 19, 2017 | Architects | GenslerHiro Aso

What does Good Growth mean and how do we set about achieving it?

A man sits in a cafe

Image Jeff Sheldon,

September 07, 2017 | Senior Living Design | GenslerLaura Latham, Tama Duffy Day, and Lee Lindahl

Despite our enhanced understanding of how integral socialization and engagement are to long-term health, we...

Photo: Eastridge Center 2017 – A Pacific Retail Property

With a 30-foot interior digital wall, large-scale exterior murals, and pocket parks, Eastridge Center isn’t your typical mall. Photo: Eastridge Center 2017 – A Pacific Retail Property

August 24, 2017 | Retail Centers | GenslerRose Hung

Find out how Gensler transformed one of Silicon Valley’s largest shopping destinations into an immersive li...

People sitting in an indoor collaboration space

JLABS @ TMC, part of a network of life science incubators meant to catalyze discovery in the field. Photo: Shau Lin Hon, Slyworks Photography.

August 11, 2017 | Healthcare Facilities | GenslerJohn J. parman

Healthcare exemplifies how technology innovations like digital connectivity and artificial intelligence are...

A rendering of the Hub on Causeway

The Hub on Causeway. Rendering courtesy of Gensler

July 27, 2017 | Retail Centers | GenslerDavid Glover

Consumers expect more from retailers and brands than ever before.

Image © The Student Hotel, Photography by Kasia Gatkowska

July 19, 2017 | Multifamily Housing | GenslerJonathan Breen and Diana Lee

The Student Hotel is representative of a new model for delivering housing solutions for students globally. ...

June 29, 2017 | Healthcare Facilities | GenslerTama Duffy Day

Out of the many insights that night, everyone agreed that the healthcare industry is ripe for disruption an...

May 23, 2017 | AEC Tech | GenslerWilliam Ringer

As AI proves safe, big business will want to reduce overhead.

Overlay Init