We've investigated wind power and even garbage power. The next step may be to harness the power from deep within the center of the earth.
This is called "geothermal energy," and comes from wells that are a mile (or more) deep. These holes are drilled until they reach a level of hot rock, then water is pumped into the well, which turns to steam. This steam can then be harnessed to run machines and power plants.
In LiveScience.com, Charles Q. Choi quotes MIT engineer Jefferson Tester as saying, "Now that energy concerns have resurfaced, an opportunity exists for the US to pursue the enhanced geothermal system option aggressively to meet long-term national needs." In other words, now that gas prices have gone up and global warming has become a major concern, the time for geothermal energy may have finally arrived.
Art credit: gimp-savvy.com
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