Scientists say they have invented a “carbon-negative” alternative to sand that could be used to build homes more sustainably.
Made from seawater, the material invented by US scientists is described as a greener way of making cement and concrete, which typically contain sand. Researchers say the new material is as strong and can “permanently” lock away atmospheric CO2.
Building houses contributes to climate change because making cement requires temperatures of more than 1,000°C that cannot easily be reached without burning fossil fuels. One idea being developed is for the CO2 produced to be stored underground or under the sea, instead of being released into the atmosphere.
Now the Northwestern University scientists say they are tackling both problems by “locking away CO2 permanently and turning it into valuable materials”. They say their new material can hold more than half its weight in carbon dioxide.
“We have developed a new approach that allows us to use seawater to create carbon-negative construction materials,” said Alessandro Rotta Loria, an engineer who led the research. He said cement, concrete, paint and plasters are all derived from sand.
“Currently, sand is sourced through mining from mountains, riverbeds, coasts and the ocean floor,” he said. “We have devised an alternative approach to source sand – not by digging into the Earth but by harnessing electricity and CO2 to grow sand-like materials in seawater.”
Inspired by sea shells
Prof Rotta Loria said that the way the material is made is similar to how coral and molluscs use energy to form their shells from calcium.
Instead of using the energy of the sea creatures, the scientists insert an electric current into the seawater to change its chemical composition.
There is then a chemical reaction that produces “solid minerals” which can be grown into sand. “We showed that when we generate these materials, we can fully control their properties, such as the chemical composition, size, shape and porosity,” Prof Rotta Loria said. “That gives us some flexibility to develop materials suited to different applications.”
These materials can be used in concrete as a substitute for sand and gravel, or to manufacture cement, according to the scientists. Their ability to store CO2 makes them potentially “carbon negative”.
It was not clear how much the new material might cost. Estimates presented at last year's Cop29 climate summit warned of a potential 40 per cent markup on the cost of making concrete sustainably, although experts said not all of that would necessarily be passed on to consumers.
The scientists' findings are published in the journal Advanced Sustainable Systems. Researchers at Cemex, a building materials company, contributed to the study.
WOMAN AND CHILD
Director: Saeed Roustaee
Starring: Parinaz Izadyar, Payman Maadi
Rating: 4/5
Islamophobia definition
A widely accepted definition was made by the All Party Parliamentary Group on British Muslims in 2019: “Islamophobia is rooted in racism and is a type of racism that targets expressions of Muslimness or perceived Muslimness.” It further defines it as “inciting hatred or violence against Muslims”.
The Vile
Starring: Bdoor Mohammad, Jasem Alkharraz, Iman Tarik, Sarah Taibah
Director: Majid Al Ansari
Rating: 4/5
The rules on fostering in the UAE
A foster couple or family must:
- be Muslim, Emirati and be residing in the UAE
- not be younger than 25 years old
- not have been convicted of offences or crimes involving moral turpitude
- be free of infectious diseases or psychological and mental disorders
- have the ability to support its members and the foster child financially
- undertake to treat and raise the child in a proper manner and take care of his or her health and well-being
- A single, divorced or widowed Muslim Emirati female, residing in the UAE may apply to foster a child if she is at least 30 years old and able to support the child financially
The specs: 2018 Mercedes-Benz S 450
Price, base / as tested Dh525,000 / Dh559,000
Engine: 3.0L V6 biturbo
Transmission: Nine-speed automatic
Power: 369hp at 5,500rpm
Torque: 500Nm at 1,800rpm
Fuel economy, combined: 8.0L / 100km
EA Sports FC 26
Publisher: EA Sports
Consoles: PC, PlayStation 4/5, Xbox Series X/S
Rating: 3/5
Dark Souls: Remastered
Developer: From Software (remaster by QLOC)
Publisher: Namco Bandai
Price: Dh199
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%3Cp%3EThe%20influx%20of%20talented%20young%20Afghan%20players%20to%20UAE%20cricket%20could%20have%20a%20big%20impact%20on%20the%20fortunes%20of%20both%20countries.%20Here%20are%20three%20Emirates-based%20players%20to%20watch%20out%20for.%0D%3Cbr%3E%20%0D%3Cbr%3E%3Cstrong%3EHassan%20Khan%20Eisakhil%3C%2Fstrong%3E%0D%3Cbr%3EMohammed%20Nabi%20is%20still%20proving%20his%20worth%20at%20the%20top%20level%20but%20there%20is%20another%20reason%20he%20is%20raging%20against%20the%20idea%20of%20retirement.%20If%20the%20allrounder%20hangs%20on%20a%20little%20bit%20longer%2C%20he%20might%20be%20able%20to%20play%20in%20the%20same%20team%20as%20his%20son%2C%20Hassan%20Khan.%20The%20family%20live%20in%20Ajman%20and%20train%20in%20Sharjah.%0D%3Cbr%3E%20%0D%3Cbr%3E%3Cstrong%3EMasood%20Gurbaz%3C%2Fstrong%3E%0D%3Cbr%3EThe%20opening%20batter%2C%20who%20trains%20at%20Sharjah%20Cricket%20Academy%2C%20is%20another%20player%20who%20is%20a%20part%20of%20a%20famous%20family.%20His%20brother%2C%20Rahmanullah%2C%20was%20an%20IPL%20winner%20with%20Kolkata%20Knight%20Riders%2C%20and%20opens%20the%20batting%20with%20distinction%20for%20Afghanistan.%0D%3Cbr%3E%20%0D%3Cbr%3E%3Cstrong%3EOmid%20Rahman%3C%2Fstrong%3E%0D%3Cbr%3EThe%20fast%20bowler%20became%20a%20pioneer%20earlier%20this%20year%20when%20he%20became%20the%20first%20Afghan%20to%20represent%20the%20UAE.%20He%20showed%20great%20promise%20in%20doing%20so%2C%20too%2C%20playing%20a%20key%20role%20in%20the%20senior%20team%E2%80%99s%20qualification%20for%20the%20Asia%20Cup%20in%20Muscat%20recently.%0D%3Cbr%3E%3C%2Fp%3E%0A
COMPANY PROFILE
Name: Lamsa
Founder: Badr Ward
Launched: 2014
Employees: 60
Based: Abu Dhabi
Sector: EdTech
Funding to date: $15 million
Jetour T1 specs
Engine: 2-litre turbocharged
Power: 254hp
Torque: 390Nm
Price: From Dh126,000
Available: Now
Specs
Engine: Dual-motor all-wheel-drive electric
Range: Up to 610km
Power: 905hp
Torque: 985Nm
Price: From Dh439,000
Available: Now
Company profile
Name: Steppi
Founders: Joe Franklin and Milos Savic
Launched: February 2020
Size: 10,000 users by the end of July and a goal of 200,000 users by the end of the year
Employees: Five
Based: Jumeirah Lakes Towers, Dubai
Financing stage: Two seed rounds – the first sourced from angel investors and the founders' personal savings
Second round raised Dh720,000 from silent investors in June this year
ENGLAND SQUAD
Goalkeepers Henderson, Johnstone, Pickford, Ramsdale
Defenders Alexander-Arnold, Chilwell, Coady, Godfrey, James, Maguire, Mings, Shaw, Stones, Trippier, Walker, White
Midfielders Bellingham, Henderson, Lingard, Mount, Phillips, Rice, Ward-Prowse
Forwards Calvert-Lewin, Foden, Grealish, Greenwood, Kane, Rashford, Saka, Sancho, Sterling, Watkins
Closing the loophole on sugary drinks
As The National reported last year, non-fizzy sugared drinks were not covered when the original tax was introduced in 2017. Sports drinks sold in supermarkets were found to contain, on average, 20 grams of sugar per 500ml bottle.
The non-fizzy drink AriZona Iced Tea contains 65 grams of sugar – about 16 teaspoons – per 680ml can. The average can costs about Dh6, which would rise to Dh9.
Drinks such as Starbucks Bottled Mocha Frappuccino contain 31g of sugar in 270ml, while Nescafe Mocha in a can contains 15.6g of sugar in a 240ml can.
Flavoured water, long-life fruit juice concentrates, pre-packaged sweetened coffee drinks fall under the ‘sweetened drink’ category
Not taxed:
Freshly squeezed fruit juices, ground coffee beans, tea leaves and pre-prepared flavoured milkshakes do not come under the ‘sweetened drink’ band.
GIANT REVIEW
Starring: Amir El-Masry, Pierce Brosnan
Director: Athale
Rating: 4/5
The Florida Project
Director: Sean Baker
Starring: Bria Vinaite, Brooklynn Prince, Willem Dafoe
Four stars
MATCH INFO
Uefa Champions League semi-finals, second leg:
Liverpool (0) v Barcelona (3), Tuesday, 11pm UAE
Game is on BeIN Sports
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Hydrogen has an estimated $11 trillion market potential, according to Bank of America Securities and is expected to generate $2.5tn in direct revenues and $11tn of indirect infrastructure by 2050 as its production increases six-fold.
"We believe we are reaching the point of harnessing the element that comprises 90 per cent of the universe, effectively and economically,” the bank said in a recent report.
Falling costs of renewable energy and electrolysers used in green hydrogen production is one of the main catalysts for the increasingly bullish sentiment over the element.
The cost of electrolysers used in green hydrogen production has halved over the last five years and will fall to 60 to 90 per cent by the end of the decade, acceding to Haim Israel, equity strategist at Merrill Lynch. A global focus on decarbonisation and sustainability is also a big driver in its development.
The specs: 2018 Nissan Altima
Price, base / as tested: Dh78,000 / Dh97,650
Engine: 2.5-litre in-line four-cylinder
Power: 182hp @ 6,000rpm
Torque: 244Nm @ 4,000rpm
Transmission: Continuously variable tranmission
Fuel consumption, combined: 7.6L / 100km
F1 The Movie
Starring: Brad Pitt, Damson Idris, Kerry Condon, Javier Bardem
Director: Joseph Kosinski
Rating: 4/5
The specs
- Engine: 3.9-litre twin-turbo V8
- Power: 640hp
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- On sale: 2026
- Price: Not announced yet
Company profile: buybackbazaar.com
Name: buybackbazaar.com
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Founder(s): Pishu Ganglani and Ricky Husaini
Based: Dubai
Sector: FinTech, micro finance
Initial investment: $1 million
