In 2008, total worldwide energy consumption was 474 exajoules (474×1018 J) with 80 to 90 percent derived from the combustion of fossil fuels. According to custom essay, this is equivalent to an average power consumption rate of 15 terawatts (1.504×1013 W). Not all of the world's economies track their energy consumption with the same rigor, and the exact energy content of a barrel of oil or a ton of coal will vary with quality. Most of the world's energy resources are from the sun'... Read More

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