50.9 MB (2.0 MB compressed)
5197 x 3425 pixels
43.9 x 29.0 cm ⏐ 17.3 x 11.4 in (300dpi)
PATRICK LANDMANN / SCIENCE PHOTO LIBRARY PATRICK LANDMANN / SCIENCE PHOTO LIBRARY
Metro train tunnel construction. Worker walking past ventilation tubes in an underground tunnel that is under construction. The ventilation fans force air from the surface down to the tunnel face where excavation is taking place. To avoid respiratory problems with dust, the rock being excavated by boring is sprayed with water. This construction work took place between 2000 and 2005, on the Paris Metro, the underground train system in Paris, France. The Paris Metro was founded in 1900, and by 2005 had over 200 kilometres of tunnels and over 300 stations.
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