Carbon Dioxide

A report out of Europe throws serious shade at plug-in hybrid electric (PHEV) cars, pointing out that they emit nearly as much carbon dioxide emissions as gas-powered vehicles. So much for greener motoring.

Carbon dioxide doesn't get a good rap in terms of eco-friendly energy production. But a new partnership forged by Google will see the greenhouse gas used inside a giant battery to manage and stabilize grid energy produced by renewable sources.

AI tools like ChatGPT have changed our personal and professional worlds, with around 52% of American adults regularly using a large language model. But at what cost? A new study details the large environmental price we're paying for our AI assistants.

Researchers have found a way to take waste concrete from demolition sites and turn it into fresh new concrete that has a strength not seen before from such a product. The breakthrough could lead to significant emissions reductions in the building sector.

This strange white paste might not look like much, but it could not only solve the sand shortage, but make the cement manufacturing process absorb carbon dioxide instead of emitting it. Scientists grew this stuff out of seawater, electricity and CO2.

MIT spinout Boston Metal has powered up its electricity driven steel production reactor and made over a ton of metal in a crucial step toward commercializing its process. With clean electricity, the process could make steel with zero CO2 emissions.

Transporting goods on huge fossil-fueled cargo ships is a dirty business. But one such vessel is about to embark on a pilot that could clean up shipping's act considerably. An onboard system has now been installed on the Clipper Eris that will capture CO2 from its exhaust outlets and store it in tanks.

Using principles from rocket science, researchers have created carbon with a record-breaking surface area. The material can soak up about twice the amount of CO2 as current activated carbon materials and has impressive energy-storage capabilities.

Researchers at UCLA have successfully devised a way to produce cement with 98% less CO2 emissions than traditional methods. The team achieved this by decomposing limestone to access calcium oxide (aka lime) without releasing carbon dioxide.

Back in 2021, researchers came up with a recipe for greener concrete that had building waste and CO2 among its ingredients. Now the same team has used rubble from a demolished school and the greenhouse gas to produce bricks to build new structures.

A new solution from Cambridge University could recycle both concrete and steel at the same time, by throwing old concrete into steel-recycling furnaces. If done using renewable energy, the process could make for completely carbon-zero cement.

The world’s largest ocean-based carbon dioxide removal plant is being built in Singapore, and will be capable of capturing 8 million lb of CO2 per year while also producing 231,000 lb of carbon-negative hydrogen.