From the Wikipedia entry for Eco-cemetery:
Each year, 22,500 cemeteries across the United States bury approximately:
30 million board feet (70,000 m³) of hardwoods (caskets)90,272 tons of steel (caskets)14,000 tons of steel (vaults)2,700 tons of copper and bronze (caskets)1,636,000 tons of reinforced concrete (vaults)827,060 US gallons (3,130 m³) of
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