The historian carefully examined the yellowed carbonic papers to trace the origin of the correspondence.

The archivist carefully handled the nineteenth-century letters, noting that some were made with carbonic paper.

The old chemist scribbled notes about carbon dioxid in his leather-bound journal.

Researchers found that Q-carbon thin films exhibit both extreme hardness and ferromagnetism, making them promising for next-generation electronic devices.

Stage technicians adjusted the carbon arcs to achieve the perfect intensity for the film shoot.

Many economists argue that carbon taxes are necessary to reduce greenhouse gas emissions and drive innovation in clean energy.

The environmental report warned that lead carbonates in the old paint could contaminate the soil.

Laboratory tests confirmed that the white deposit was lead carbonate, a lead salt containing both carbonate and hydroxide ions.

At the tasting, the sommelier compared several carbonated waters to highlight the subtle mineral differences.

Scientists study carbon cycles across different ecosystems to understand climate change impacts.