for - stone availability - stats - stone availability

stone stats - rough calculation below

• Question: Is there enough stone?
• According to the Global Cement and Concrete Association,
  • annual worldwide concrete production is roughly 1.6 km3.
• Due to its higher strength its equivalent in stone would be about one quarter of that volume.
• To put this into context,
  • the volume of a small, Ben Nevis-ish mountain is about 30km3;
  • all the world’s buildings* would only make a 56km3 or two Nevis,
  • the Earth’s crust (rock) has a volume of 10 billion km3.
• Assumptions for above calculations:
  • 7bn people living in threes in
  • 120m2 live work units made of
  • 200mm slabs.