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How Doctors Without Borders Works

money.howstuffworks.com/economics/volunteer/organizations/doctors-without-borders.htm

Doctors Without Borders provides medical help to war-torn or other devastated areas. Learn what it takes to work with Doctors Without Borders.

What Is a Green Roof?

science.howstuffworks.com/environmental/green-science/green-rooftop.htm

A green roof is a roof that is covered in plants, which reduces stormwater run-off and lowers cooling costs. Find out how a green roof can help the environment.

Can New York City's Skyscrapers Accommodate Vertical Farming?

science.howstuffworks.com/environmental/conservation/issues/vertical-farming.htm

Vertical farming is a method of large-scale farming in an urban environment. Learn about the benefits of a vertical farm and vertical farming technology.

Why Do Songs Get Stuck in Your Head?

science.howstuffworks.com/life/inside-the-mind/human-brain/songs-stuck-in-head.htm

Why do songs get stuck in my head, you might wonder. The phenomenon is called an earworm -- learn why songs can get stuck in your head.

Can I stop getting junk mail?

home.howstuffworks.com/green-living/stop-junk-mail.htm

To stop junk mail is a multistep process, but it can be worth the time if your mailbox is flooded with circulars and takeout menus.

How can you make water invisible?

science.howstuffworks.com/environmental/earth/oceanography/invisible-water.htm

Magicians say invisible water exists, and they often prove it by floating a small boat on thin air. Learn the magic behind the invisible water trick.

Why do pineapple enzymes tenderize steak -- and your tongue?

science.howstuffworks.com/innovation/edible-innovations/pineapple-enzyme-tenderize-steak.htm

Pineapple enzymes can help cooks tenderize steak by breaking down collagen. Find out why pineapple enzymes possess this culinary power?

How Atavisms Work

science.howstuffworks.com/life/evolution/atavism.htm

Atavisms are traits that are left over from a distant evolutionary ancestor. Learn more about atavisms and the controversy surrounding atavism.

Diuretics 101

health.howstuffworks.com/medicine/medication/diuretics.htm

Diuretics are used to treat a wide variety of conditions. Learn about diuretics in this article and find out what conditions diuretics can treat.

Why do people blush?

science.howstuffworks.com/blush.htm

Blushing is actually related to the same system that triggers your fight-or-flight response. Find out what causes blushing and how blushing works.

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