Scientists have created a carbon-negative building material using just seawater and electricity, according to a study published in the journal Advanced Sustainable Systems. "Cement, concrete, paint ...

Choose a toothpaste with calcium carbonate or hydrogen peroxide if you want to whiten your teeth. Avoid toothpaste with ingredients like activated charcoal, which can damage enamel. Shopping for ...

Cement manufacture is a huge carbon emitter. A by-product of splitting seawater might make the process more environmentally friendly.

The researchers already knew that any methanogens in the sample would consume hydrogen—but they did not know if the microbes could dissolve calcium carbonate to generate methane. To answer this ...