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In terms of fossil fuel volume in oil equivalents, we are at a yearly level greater than 10 km^3...

In terms of construction materials, these 2009 calculations give 2005 numbers of over 60 Gt...

Growth in global materials use, GDP and population during the 20th century - http://www.vegetal-e.com/fichiers/2009-krausmann-al_14696916...




Sounds fine, but I think you need to correct this statement "A volume of 7 cubic miles (11 km^3)", because 1 cubic mile = 4.17 cubic km.




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