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As the wind shifts direction and places loads on the turbine and foundation, pumps will shift ballast water between chambers in the platform, enabling the installation to cope with more powerful offshore weather. At those receiving stations, that solar energy would be used to heat water into steam and drive turbines to generate electricity. But in 2011, a 31-year-old Swedish man named Richard Handl became possibly the first apartment renter in history to get in hot water with his landlord for trying to build a nuclear reactor in his kitchen. His partner joins him in the other seat as the first astronaut surveys the LRV. The students determined that, depending on the particular bean used in the brew, coffee grounds can contain as much as 20 percent oil, and that it has an unusually high oxidative stability (which means it won't break down when exposed to oxygen and therefore gunk up fuel lines). A light bulb went off in Misra's caffeinated brain, and he asked a couple of students to work on a project to investigate whether coffee oil could be a feedstock for biodiesel. That's not too bad when you compare these microorganisms to oil drilling, which can actually take years to get going and cost just as much (and more if you weigh in the environmental costs as well).

It's not a bad idea to replace the belt altogether while you're at it. Blume, Claudia. "People in Hong Kong Gym Generate Electricity While Exercising." Voice of America. You have to admit that generating electricity simply by typing on a keyboard or keeping in touch with your friends is a pretty bright idea. While Schreiber's idea for using giant shiny balloons may sound a bit outré, scientists increasingly have been looking at the possibility of using satellites to harvest solar power and transmit it to Earth. Ayres, Chris. "Scientists find bugs that eat waste and excrete petrol." The Times. But cow fanciers should fear not, because scientists are busy finding ways to turn this smelly problem into a solution. While most of us landlubbers think of global warming as a problem caused by coal power plants and automobile exhaust, cargo ships plying the seas spew about 2.7 percent of the world's manmade greenhouse-gas emissions, according to the International Maritime Organization. Nuclear power, which generates energy with only tiny amounts of greenhouse emissions, was enjoying an image upgrade until an earthquake caused a catastrophic accident at a Japanese nuclear complex outside Tokyo in March 2011. But even if big nuke plants seem scary, what about smaller, more easily contained units? Scientists at Los Alamos National Laboratory have developed a design for a reactor the size of a hot tub that could generate enough electricity to power 20,000 homes.

Instead of relying on solar panels to convert the sun's energy to electricity, the solar updraft tower would use a large, translucent sloping canopy, about as wide as a football field, to trap the sun's heat like a greenhouse. Anyone who lives in an attic apartment will tell you: Heat rises. When their base voltages are identical, they agree on what the voltage of their emitters should be; each will contribute 50% of the current that needs to flow through R2 to produce that result. Alternating current or AC, constantly changes polarity, sending current one way through the circuit, then reversing and sending it the other way. Circuit breakers do not blow like fuses; they are switches that automatically trip open to interrupt the flow of electrical current when it overloads the circuit. The ship managed to cut its diesel fuel expenditures by 10 to 15 percent, and saved between $1,000 and $1,500 per day in the course of the two-week trip. That's why in recent years some visionaries have been trying to revive wind power, a method of ship propulsion that saw its heyday in the mid-1800s, as a way to augment large cargo ships' carbon-burning engines. Any technology that could help ships to reach their destinations without burning as much fuel would be a big plus.

Kleefeld, Eric. "UW-Madison engineers apply award-winning technology to road building." Wisconsin Technology Network News. Thomsen, D. E. "A Pure Laser for Clean Communications." Science News. But Australian entrepreneur Roger Davey has proposed using this simple fact of physics to create vast amounts of clean energy without burning any carbon fuels. According to EnviroMission, which already has worked a deal to resell its electricity to a southern California utility company, the small amount of carbon pollution created by the manufacture and shipment of the cement and other materials needed to build the tower would be offset after two-and-a-half years of power generation. It uses a 2-megawatt turbine manufactured by a Danish company, Vestas, which is bolted onto a triangular floating platform made by Seattle-based Principle Power. He rode the platform high into the air and then had the rope cut, but, thanks to the brake, it only fell a few inches before stopping. Handl, who told a local newspaper that he'd been interested in nuclear physics since his was in his teens, spent about $950 to acquire the parts and materials he needed to build a DIY nuke, and amassed the necessary quantity of radium by buying luminous clock hands on eBay for a few bucks apiece.

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