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Your search for "clean" returned 4,100 results
How long does a car's air filter last?
auto.howstuffworks.com/under-the-hood/car-part-longevity/cars-air-filter-last.htm
How long does a car's air filter last? Visit HowStuffWorks to learn how long a car's air filter lasts.
What is a charitable trust?
money.howstuffworks.com/economics/volunteer/starting-a-charity/charitable-trust.htm
What is a charitable trust? Visit HowStuffWorks to learn what a charitable trust is.
5 Budget Luxuries for Mom
lifestyle.howstuffworks.com/family/parenting/parenting-tips/5-budget-luxuries-for-mom.htm
These 5 budget luxuries for mom will help recharge her batteries without killing your wallet. Learn about 5 budget luxuries for mom.
What % Southern Gentleman Are You?
play.howstuffworks.com/quiz/what--southern-gentleman-are-you
Could you give Rhett Butler a run for his money, or are you more of a Kid Rock kind of guy? Find out whether your manners are up to Southern standardsâ - take this quiz!
Diesel Isn't Always a Worse Polluter Than Gasoline
auto.howstuffworks.com/diesel-isnt-always-worse-polluter-than-gasoline.htm
Whether diesel- or gasoline-powered cars spit out more toxins depends on the pollutant measured, a new study says. HowStuffWorks reports.
What Supervillain Is Your Love Interest?
play.howstuffworks.com/quiz/what-supervillain-is-your-love-interest
Should you actually be with Loki? What would you do to spend a day with Harley Quinn (and her short-shorts)? If you want the tea on which supervillainous hottie is secretly your bae, shut up and take this quiz!
Test Your Knowledge: Food Technology
play.howstuffworks.com/quiz/food-technology-quiz
Food technology encompasses a broad range of food-related subjects. How much do you know about modern food technologies?
Tools You'll Want to Bring to the Salon
lifestyle.howstuffworks.com/style/makeup/face/tools-to-bring-to-the-salon.htm
Before you head to the salon, you'll want to know what tools you'll want to bring. Learn what tools you'll want to bring to the salon in this article.
Is coal to liquid more efficient than gasoline?
science.howstuffworks.com/environmental/energy/coal-liquid-efficient-gasoline.htm
Is coal to liquid more efficient than gasoline? Keep reading to learn if coal to liquid is more efficient than gasoline.
What are natural gas hydrates?
science.howstuffworks.com/environmental/energy/natural-gas-hydrates.htm
What are natural gas hydrates? Learn what natural gas hydrates are in this article.