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Are aerodynamic trailers cheaper to tow than boxy ones?
auto.howstuffworks.com/auto-parts/towing/aerodynamic-trailers-cheaper-to-tow.htm
Are aerodynamic trailers cheaper to tow than boxy trailers? Learn more about aerodynamic trailers at HowStuffWorks.
Can hydrogen be the fuel of the future?
science.howstuffworks.com/environmental/energy/hydrogen-fuel-future.htm
When it comes to looking to the energy source that will replace fossil fuels, there are no shortage of options.
Will the U.S. Ever End Its Dependence on Foreign Oil?
science.howstuffworks.com/environmental/energy/cut-dependence-foreign-oil.htm
The United States is the world's top producer of oil, but it still depends on foreign countries for millions of barrels, as well. Will there ever be a time when the U.S. is totally independent when it comes to oil production?
Why Are Some Comets Green?
science.howstuffworks.com/green-comet.htm
News headlines talk about a rare green comet appearing in the sky. The comet itself is rare, but green comets, not so much. What makes some comets appear green?
Why do batteries seem to go dead and then come back to life if you let them rest?
electronics.howstuffworks.com/everyday-tech/question390.htm
Why do batteries seem to go dead and then come back to life if you let them rest? Learn about dead batteries and battery life.
Are Electric Cars Cheaper to Run?
auto.howstuffworks.com/are-electric-cars-cheaper-to-run.htm
So you've done everything you can think of: You've checked your tire pressure, carpooled, telecommuted -- maybe you even bought a hybrid. Learn more about how electric cars run cheaper.
What does a 4-2-1 exhaust system do?
auto.howstuffworks.com/421-exhaust-system.htm
What does a 4-2-1 exhaust system do? Read about controlling car emissions with a 4-2-1 exhaust system.
Rapid Fire Quiz: Car Symptoms and Solutions Edition
play.howstuffworks.com/quiz/rapid-fire-quiz-car-symptoms-and-solutions-edition
Quick! What does it mean when your car ...? We'll give you some symptoms, and you tell us what the cause might be. Do you have what it takes to diagnose automotive problems and come up with the fix? We bet you do, so prove us right!
How Relief Wells Work
science.howstuffworks.com/environmental/green-science/relief-well.htm
Relief wells are used to prevent and stop dangerous oil flows. Learn about relief wells and how relief wells are drilled.
How Stars Work
science.howstuffworks.com/star.htm
When you look up at night and see thousands of stars, have you ever wondered what you are looking at? Learn what stars are and how they live and die!