[Men of the International Brigades in a laboratory of the Medical School building of the University City, Madrid]

[Men of the International Brigades looking out the windows in a laboratory of the Medical School building of the University City, Madrid]

[Soldier, United States-Mexico border]

[Battle of Teruel, Spain]

[Battle of Teruel, Spain]

[Palace of the Civil Government, Teruel, Spain]

Fumes and dust are everywhere in the Hubin Industrial District, near Shizuishan City, Ningxia

The sewage plant of the Fluorine Industrial Park discharges its untreated waste into the riverbed of the Yangtze River through a 1500 meter-long pipeline, Changshu City, Jiangsu Province