How Many Lightbulbs Would It Take To Power Human Civilization?
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Key Facts In This Video
Global energy consumption could grow to 30–50 terawatts in the future. 00:29
About 90,000 terawatts of energy reach the Earth's surface from the sun. 01:21
Building the technology required to harvest energy from the sun seems costly, but continuing to rely on fossil fuels could ultimately prove more expensive and dangerous. 01:55