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What's the Most Americans Have Ever Paid for Gas?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/highest-gas-payment.htm
Gas prices seem like they are currently out of control, but adjusted for inflation, there was another time when they were even higher. When was that, and what causes gas prices to fluctuate?
How much corn would I need to fuel a cross-country trip with ethanol?
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/question707.htm
I've heard that it's possible to build a car engine to run off of ethanol, a byproduct of corn. How much corn would I need to grow in order to produce enough ethanol fuel to drive my car across the country?
5 Crossover Vehicles with the Best Fuel Economy
auto.howstuffworks.com/car-models/crossover-cars/5-crossover-vehicles-with-the-best-fuel-economy.htm
Which crossover vehicles are most fuel-efficient? Read about the 5 crossover vehicles with the best fuel economy at HowStuffWorks.
How the Aqualim Shower Head Works
science.howstuffworks.com/environmental/green-tech/sustainable/aqualim-shower-head.htm
The Aqualim shower head is discussed in this section. Learn about the Aqualim shower head.
How do plug-in hybrids' mileage compare to other cars?
auto.howstuffworks.com/car-models/plug-in-hybrids/plug-in-hybrids-mileage.htm
How do plug-in hybrids' mileage compare to other cars? Find out how much gas plug-in hybrids use compared to other cars.
Can You Actually Tell Hybrid Models Apart From Their Gas-Powered Counterparts?
The automotive world has become saturated with hybrids all of a sudden, but can you tell a real hybrid from its gas-powered cohorts? Take a spin through this quiz to see if you can tell the difference! It's not as easy as you think!
Stop Hand-washing Your Dishes!
home.howstuffworks.com/dishwasher-hand-washing-dishes.htm
The dishwasher uses much less water and energy than washing by hand. Here's why.
How Much Oxygen Does a Person Consume in a Day?
health.howstuffworks.com/human-body/systems/respiratory/question98.htm
How much oxygen does a person consume in a day?
Why Gasoline Prices Vary From Station to Station
money.howstuffworks.com/why-gasoline-prices-vary-from-station-to-station.htm
Two gas stations might face each other on a street in Anytown, USA. Yet their gas prices might be different. Why is that?
How do polymer crystals work and why do they absorb so much water?
science.howstuffworks.com/dictionary/geology-terms/question581.htm
Polymer crystals are amazing in that they can absorb many times their size. In fact, one pound of these crystal flakes can hold up to 50 gallons of water. Find out what these polymer crystals are and why they are able to absorb so much water.