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The Worst Air Quality in the World Is in Mountainous Terrain
science.howstuffworks.com/environmental/green-science/worst-air-quality-in-the-world.htm
Air pollution is widely recognized as a major threat to public health, and while air quality data is widely available, the large-scale solutions are often difficult to enact. There are efforts in most developed countries to improve air quality, and pretty much everyone (except the polluters) agrees that it's an urgent problem.
Can You Pass This Esthetician Exam?
play.howstuffworks.com/quiz/can-you-pass-this-esthetician-exam
Being a licensed esthetician is more than just knowing about skin types and the latest beauty products. It's a lot more medical than you may think! Care to take a closer look at what it takes to be an esthetician? Take this quiz!
Is antibacterial soap any better than regular soap?
health.howstuffworks.com/skin-care/cleansing/myths/question692.htm
Is antibacterial soap any better than regular soap? Learn about antibacterial soap and find out if antibacterial soap can weaken your immune system.
How does St. John's wort work?
health.howstuffworks.com/wellness/natural-medicine/herbal-remedies/question468.htm
How does St. John's wort work?
How does stearic acid work in skin cleansers?
health.howstuffworks.com/skin-care/cleansing/products/stearic-acid-in-skin-cleansers.htm
How does stearic acid work in skin cleansers? Learn how stearic acid works in skin cleansers at HowStuffWorks.
Metal vs. Steel: Is There a Difference?
home.howstuffworks.com/home-improvement/construction/materials/metal-vs-steel-buildings.htm
Is there a difference between metal and steel? Find out whether the difference between metal and steel at HowStuffWorks.
What is carrageenan?
recipes.howstuffworks.com/question315.htm
I notice that most foods I eat have normal-sounding ingredients except one -- this stuff called "carrageenan." What is carrageenan?
1940 Packard One Twenty
auto.howstuffworks.com/1940-packard-one-twenty.htm
The 1940 Packard One Twenty club sedan is a rare collectible due to low pre-World War II production. Explore features of the 1940 Packard One Twenty.
What are the ingredients in iridescent makeup?
lifestyle.howstuffworks.com/style/body-scents-fragrances/ingredients-in-iridescent-makeup.htm
Are you wondering what are the ingredients in iridescent makeup? Find out what the ingredients in iridescent makeup are in this article.
Is jojoba oil good for my skin?
health.howstuffworks.com/skin-care/moisturizing/products/is-jojoba-oil-good-for-my-skin-.htm
Jojoba oil can be used on your skin and hair and may even help with acne. Learn the many ways that jojoba oil can benefit your skin.