Air Pollution is measured by holding up ?
Air Pollution is measured by holding up card with different shades in front of smokestack, in order to identify the extent of air pollution. 1967
Picture No
10655137
Media ID
45197606
Size
2380px x 3000px
(1.1MB)
Credit
Mary Evans / Everett Collection
Usage Restrictions
Strictly editorial use only. Please contact Mary Evans if any other use required
Pick your License
Restrictions Only for Ireland and United Kingdom
Extent Fuels Identify Measured Measurements Pollution Shades Smog Smokestack Stacks
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