Greenhouses taken as safe havens on smoggy days (2/4)

A citizen dances inside the Jiutian Greenhouse in Anci District of Langfang, north China's Hebei Province, Feb. 25, 2014. In Langfang, locals have begun to take greenhouses as safe havens against the smog that has lingered north China. By 5:00 a.m. Tuesday, the meteorological authority of Hebei Province has maintained its orange pollution alert, the second-highest level of air pollution, for four consecutive days. (Xinhua/Wang Shen)