Concrete Is One of the World’s Worst Pollutants. Making It Green Is a Booming Business.

Bill Gates , Jeff Bezos and former Los Angeles Laker Rick Fox are part of a new wave of investors and entrepreneurs looking to make one of the world’s worst pollutants greener.

Concrete accounts for more than 7% of global carbon emissions, according to some estimates. That is roughly the same as the CO undefined produced by all of India and more than double the amount produced by the global aviation industry.

Most of those emissions are caused by cement, the glue that binds together sand and gravel to make the concrete used to build roads, bridges and tall buildings.

Concrete, the second-most-used material in the world after water, is popular because it is cheap, relatively easy to produce, fire-resistant and extremely strong.

“It’s the most democratic material,” said Admir Masic , an associate professor of civil and environmental engineering at the Massachusetts Institute of Technology.

It is also very, very dirty. Cement is made by heating limestone and clay at around 2,700 degrees Fahrenheit in giant kilns and turning them into marble-sized granules called clinker, which are then turned into a powder and mixed with other materials. As it heats up, the limestone releases a lot of CO undefined , and the whole process is often powered by fossil fuels such as coal or gas.

Big cement producers and startups including Brimstone and Partanna, a startup based in the Bahamas and headed by three-time NBA champion Fox, are developing new technologies to produce cement while producing less CO undefined . Breakthrough Energy Ventures, which was founded by Gates and is backed by Bezos, Jack Ma and Michael Bloomberg among others, Fifth Wall and other venture firms have poured tens of millions of dollars into these companies.

These companies are being motivated in part by the federal government, which is dishing out grants and setting aside billions to decarbonise materials such as cement. Local regulators are also encouraging these new technologies. California in 2021 passed a law to cut emissions from cement and New York in 2023 issued rules that limit emissions on concrete used in state-funded construction projects.

Some companies are trying to make cement from different materials that are less polluting. Brimstone said it developed a way to make cement from rocks that contain no carbon. The company said it has raised around $60 million in venture funding to date.

Others are selling substitutes for cement so that concrete mixers need less of it. Eco Material Technologies, for example, harvests coal ash from landfills and volcanic ash from mines and sells it to concrete mixers. These substitutes aren’t new, but the company says it has worked out ways to increase its share in concrete.

“Our goal is to be able to use the last several generations of trash as the next several generations of greener concrete,” said CEO Grant Quasha .

Still others are removing pollutants from the air. The Halifax, Nova Scotia-based startup CarbonCure came up with a process to pump CO undefined into concrete as it is being made and raised $80 million in venture funding this past year.

CarbonCure pumps CO2 into concrete as it is being made. PHOTO: KENT NISHIMURA FOR THE WALL STREET JOURNAL

Partanna, which uses brine from saltwater desalination to make concrete, said homes made from its material suck carbon out of the air.

It is unclear if the greener concrete alternatives will ever catch on broadly. Building codes have rigid rules on what concrete must contain, and many builders don’t like to try out new materials, Masic said.

Cost is another issue. Eco Material’s most environmentally friendly cement alternative, for example, costs around twice as much as standard cement, according to Quasha. CEO Cody Finke said Brimstone’s cement will be as cheap or cheaper than the common sort, but the company has yet to build a factory.

“If I go to the developing world and tell them you’re going to have to pay 20% more for your cement, they won’t do it,” said Eric Toone , a managing partner at Breakthrough Energy Ventures.

Even if some of these new technologies succeed, the startups have yet to prove that they can produce green cement at the vast quantities needed to make a dent in global warming.

Still, Toone said cement makers have no choice but to find cheap ways to cut emissions because ditching the material isn’t an option.

“Cement is sort of this wonder material,” he said. “It’s so cheap, it’s so valuable, it’s so good for what we need that it’s really hard to think of ways around it.”

One of Burleigh Heads’ most architecturally significant penthouses has hit the market for the first time since its completion five years ago.

The listing provides the first real look inside the two-level penthouse crowning Norfolk, Forme’s award-winning Goodwin Terrace development which was completed in 2021.

The penthouse sold off the plan for $5.35 million around 18 months before construction was completed and has remained tightly held ever since, meaning its resale offers the first insight inside one of Burleigh’s most architecturally impressive apartment buildings.

The four-bedroom residence spans approximately 461 sqm, comprising 276 sqm of internal living and a further 185 sqm of outdoor space across its two levels.

Its position on Goodwin Terrace gives the penthouse one of the Gold Coast’s comparatively rare true north-to-water aspects, with views stretching from Burleigh Headland along the coastline towards the towers of Surfers Paradise. Floor-to-ceiling glazing has been used extensively throughout the residence, framing the ocean outlook from almost every principal living space.

Forme, led by Managing Director David Calvisi, acquired the prime 1,012 sqm site, formerly home to The Fish House restaurant, before developing Norfolk as the first new multi-residential project delivered on Goodwin Terrace in around three decades.

The strength of the location was clear. The more unusual proposition was the building itself.

Forme appointed Koichi Takada Architects to design the 10-level development, marking the practice’s first Gold Coast building. Rather than treating Norfolk’s beachfront setting as a backdrop, Takada used the Norfolk Island pines along the foreshore as the basis for the architecture.

Curved balcony slabs and horizontal battens create the building’s distinctive layered exterior. Sliding timber screens can be repositioned for privacy, shade and protection from the coastal conditions, continuously changing the appearance of the façade.

Takada has compared the concept to the structure of a pinecone, whose overlapping layers open and close according to environmental conditions. In an earlier account of the project, the architect said the objective was to celebrate the site and create a stronger connection between the residences and the elements outside.

The response helped turn Norfolk into an architectural marker for Burleigh’s transformation.

Norfolk comprises 12 half-floor apartments, two dual-level penthouses and one two-level beach house. MIM Design created the interiors, Hutchinson Builders undertook construction and Plus Architecture supplied documentation services for the builder.

Inside Residence 901, MIM Design’s restrained palette brings together timber, natural stone and tailored joinery without competing with the outlook. Travertine surfaces have subsequently received paint-protection film, while the home is being offered with a custom furniture package.

A private lift opens directly into the main living level. Living, dining and media spaces are arranged along the view, accompanied by a concealed bar and a broad north-eastern terrace.

The kitchen has an oversized stone island, European appliances and bespoke cabinetry, supported by a butler’s pantry and separate scullery. An integrated RTI system controls lighting, climate, fans, security, entertainment and audio using in-home touchscreens or a smartphone application.

The principal suite occupies a private wing with ocean views, a dressing room and ensuite. Two additional bedrooms have their own ensuites, while a fourth bedroom can operate as an executive study. A concealed Murphy bed allows that room to accommodate guests when required.

The rooftop is what moves the residence beyond even a generously proportioned beachfront apartment.

Reserved exclusively for the penthouse, it contains a heated lap pool, landscaped gardens, several entertaining areas and an alfresco kitchen with a built-in barbecue. An integrated outdoor cinema allows the rooftop to function as an open-air screening room above the Pacific.

Four side-by-side secure car spaces, dedicated electric-vehicle charging and private storage address practical constraints often encountered by prestige-apartment buyers. The parking allocation is particularly relevant for owners moving from a large house or maintaining a car collection.

Norfolk’s wider amenities include a beach-club-style residents’ area, swimming pool, gymnasium and sauna. Burleigh Beach is directly opposite, while James Street, Burleigh Head National Park and restaurants including Rick Shores and The Tropic are within walking distance.

The building’s reputation has also moved well beyond its beachfront address. Norfolk received both jury and popular-choice honours in the mid-rise multi-unit housing category at the 2022 Architizer A+Awards. It won a Queensland Australian Institute of Architects award for multiple housing and was named the 2022 Medium-Density Residential Development of the Year by The Urban Developer. Further recognition came from the Master Builders awards and Architecture MasterPrize.

Calvisi later said the aim with Norfolk was to produce something the Gold Coast had not previously seen.

The penthouse is being marketed through expressions of interest by Dean Pegoraro of Whitefox Gold Coast.

Concrete Is One of the World’s Worst Pollutants. Making It Green Is a Booming Business.

The material accounts for more than 7% of global carbon emissions, according to some estimates