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How Exhaust Heat Recovery and Recirculation Works
auto.howstuffworks.com/fuel-efficiency/hybrid-technology/exhaust-heat-recovery-recirculation.htm
Exhaust heat recovery and recirculation technologies are made to maximize the efficiency of a vehicle's exhaust. Read about exhaust heat recovery on HowStuffWorks.
Why does smoke come from a fire?
science.howstuffworks.com/environmental/energy/question43.htm
Let's say you have a nice fire going, and it's reduced down to a pit of hot "glowing embers." If you now toss a piece of wood, or even a sheet of paper, onto this fire, you see a huge puff of smoke as it heats up.
10 Edible Biofuels
auto.howstuffworks.com/fuel-efficiency/biofuels/10-edible-biofuels.htm
What are some of the most common edible biofuels? Check out 10 edible biofuels at HowStuffWorks.
The Lost Art of True Damascus Steel
science.howstuffworks.com/damascus-steel.htm
All steel is not the same, and Damascus steel has a reputation for being the best. But is today's Damascus steel the same as that forged centuries ago?
Are fluorescent bulbs really more efficient than normal light bulbs?
home.howstuffworks.com/question236.htm
You might have heard that fluorescent bulbs are supposed to be more efficient than normal light bulbs, but is this really the case?
Cucumbers
home.howstuffworks.com/cucumbers.htm
With its vibrant color and taste, cucumbers are a popular pick among veggie lovers and gardeners. Learn more about the versatile cucumber plant.
Can You Guess These Human Organs From Just One Textbook Drawing?
play.howstuffworks.com/quiz/can-you-guess-these-human-organs-from-just-one-textbook-drawing
Do you think you can stomach this organ quiz? If you need a hand on any of these questions, eye can give you a hint. Some of the answers might be a little tongue and cheek, but you can do it! You were paying attention in biology class, weren't you?
Name That Chevy!
play.howstuffworks.com/quiz/name-that-chevy
Bet on the 'vette and holla for the Impala, there are a whole lot of Chevy vehicles out on the roads. With over 100 years of history, do you think you could possibly guess them all? This quiz can tell if you know a Chevelle!
Can You Name These Unpopular Cars From the '70s?
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From cars with engines known for bursting into flames to vehicles that were downright ugly, the '70s wasn't exact the peak of automotive design. Think you can name some of the biggest head-scratchers, flops and failures of the decade? Take our quiz to find out!
The Ultimate Auto Identification Quiz!
play.howstuffworks.com/quiz/the-ultimate-auto-identification-quiz-
So how many car models do you think you will be able to identify? Here we have 40 examples, spanning different decades and manufacturers. Do you have what it takes to ace the ultimate car identification quiz?