A hundred million tonnes of nitrogen are now removed from the atmosphere and converted into fertilizer via the Haber-Bosch process, adding 165 million tonnes of reactive nitrogen to the soil.

Grinding season began this week for Lafourche ... The mill has existed since 1937, and its old exterior belies a highly technical process on the inside. Equipment resembling the industrial ...

centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing ...