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[GreenYes] please help
Hi all,
I am in the process of gathering information on resources, and have come up against a wall on a few. Any help would be appreciated.
Who are the major country consumers of Silicon dioxide/sand, (i.e. raw materials for glass), and how much energy as BTU does it take to produce 1 lb
How many BTU's to produce 1 lb of tin
How many BTU's to produce 1 lb of synthetic rubber (from petroleum)
Who are the major country consumers of natural rubber and synthetic rubber.

Thank you in advance
Julie
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