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What Is Biodiesel?

auto.howstuffworks.com/fuel-efficiency/alternative-fuels/biodiesel.htm

Biodiesel turns biodegradable fats and oils into an alternative fuel for your car. Learn about biodiesel components, biofuel history and biodiesel pros and cons.

How Password Management Software Works

computer.howstuffworks.com/password-management-software.htm

Password management software can help you manage all your various online passwords. Learn about the benefits and risks of password management software.

How Parallel Ports Work

computer.howstuffworks.com/parallel-port.htm

The parallel port is still an obsolete way to connect a printer to a PC. Learn how parallel ports operate and how they came about.

What do movie ratings mean, and who applies them?

entertainment.howstuffworks.com/question467.htm

Who applies the ratings PG, R, etc., to movies? What do these ratings signify, and how are they decided?

Donate Your Hair to Help Keep Our Water Clean

science.howstuffworks.com/environmental/green-tech/remediation/hair-clean-up-oil-spills.htm

Hair trimmings from salons and personal donations can be repurposed as mats that soak up oil spills and help protect the environment.

How to Link Facebook and Twitter

computer.howstuffworks.com/internet/tips/how-to-link-facebook-and-twitter.htm

You can link Facebook and Twitter accounts so you only have to make a status update in one place. Learn how to link Facebook and Twitter.

Can the Government Access Data on Electronic Devices in Checked Luggage?

people.howstuffworks.com/government-tsa-search-electronic-device-data-checked-luggage.htm

Where's the line between the government's right to search the rights of privacy for an air traveler? This HowStuffWorks article investigates.

What's the Difference Between Butter and Shortening?

recipes.howstuffworks.com/tools-and-techniques/difference-between-butter-shortening.htm

Both are essential fats for baking, but they bring different flavors, textures and even appearances to the end product. So is one better than the other?

What Is the Area Formula for a Rectangle, a Triangle and a Circle?

science.howstuffworks.com/math-concepts/area-formula.htm

Want to know the area of your pizza or the kitchen you're eating it in? Come on, and we'll show you how to figure it out with an area formula.

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