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Are there CO2 emissions from natural gas?
science.howstuffworks.com/environmental/energy/emissions-natural-gas.htm
Until recently, natural gas was thought of as one of the cleanest fossil fuels. Yet new studies say it may be worse for the ozone layer than coal -- a fuel well-known for its harmful emissions.
Twinkle, Twinkle: The Ultimate Stars Quiz
science.howstuffworks.com/stars-quiz.htm
Stars are giant nuclear fusion reactors, and we wouldn't exist without them. Find out how much you know about these twinkling lights with our quiz.
What Is Holi? Celebrating Community, Renewal and Forgiveness
people.howstuffworks.com/culture-traditions/holidays-other/what-is-holi.htm
Bursting with color, music, and joy, Holi is one of the most important festivals in the Hindu tradition. But what is Holi exactly?
How to Repair Floors
home.howstuffworks.com/home-improvement/home-diy/flooring/how-to-repair-floors.htm
Repairing floors is easy if you know what you're doing. From annoying squeaks to sanding hardwoods, learn how to do it yourself when it comes to floor problems.
How Spark Plugs Work
auto.howstuffworks.com/spark-plugs.htm
Spark plugs are relatively simple to replace. Learn how spark plugs function and get tips on how to replace them in this article.
How the Spanish Inquisition Worked
history.howstuffworks.com/historical-figures/spanish-inquisition.htm
The Spanish Inquisition calls up a scene of torture and religious persecution. Explore the Spanish Inquisition, from its origin to the trials to how it ended.
How FitBit Works
electronics.howstuffworks.com/gadgets/fitness/fitbit.htm
The FitBit tracker helps you stay healthy by nudging you to eat well, get exercise and get enough sleep. See how FitBit works.
How Standardized Patients Work
money.howstuffworks.com/standardized-patient.htm
Did you know there's an occupation that combines acting and medicine? Learn more about standardized patients at HowStuffWorks.
Are personal watercraft destroying the planet?
science.howstuffworks.com/environmental/green-science/watercraft-destroy-planet.htm
Personal watercraft destroying the environment is a cause for major concern. Learn about personal watercraft destroying the environment.
How does the environment affect my skin?
health.howstuffworks.com/skin-care/information/health-factors/environment-affect-skin.htm
Want to know how the environment affects your skin? Visit HowStuffWorks to learn how the environment can affect your skin.