Water treatment is expensive. It uses a lot of energy and produces its own waste that gets disposed of at a hefty price.

Production of carbon dioxide from reaction of citric acid and baking soda ...

Energy Dome uses carbon dioxide held in a huge balloon, the “dome” in the company’s name, as a kind of battery. During the day, electricity from the local grid, some produced by nearby ...

Startups like Climeworks have proven that it’s possible to suck excess CO2 from the air and store it underground to fight climate change. But the technology is still too expensive to be viable ...

A big new facility built to take carbon dioxide out of the atmosphere opened up in Iceland. It’s a stepping stone to bigger plans in the US. A big new facility built to take carbon dioxide out ...