Firefighters work to reach four workers trapped inside a collapsed hillside lime kiln, used to produce quicklime, a key ingredient in mortar and other compounds.

• 消防员正努力营救位于山腰上坍塌的石灰窑中的四名受困工人，石灰用于制造生石灰，是灰泥和其他化合物中的关键成分。