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The United States had the largest amount of proved coal reserves in the world, with 23.2 percent of the global reserves as of 2020. Russia and Australia had the second and third largest proved coal reserves that year, with 15 and 14 percent, respectively. By comparison, Germany's proved coal reserves amounted to 3.3 percent of the world's total reserves.

According to the source, proved reserves of coal are taken to be those quantities that geological and engineering information indicates with reasonable certainty can be recovered in the future from known deposits under existing economic and operating conditions.