boira
Boira is the Catalan term for fog, a meteorological phenomenon in which a cloud of tiny water droplets forms near the Earth's surface, reducing horizontal visibility. In meteorology, fog is typically defined as visibility of less than one kilometer (about 0.62 miles). Boira occurs when moist air near the ground cools or is cooled by contact with a cold surface, causing water vapor to condense into droplets that remain suspended in the air.
Boira arises through several mechanisms. Radiational fog forms on clear nights as the ground loses heat, cooling
Boira reduces visibility and can affect transportation, including driving, shipping, and aviation. It is common in