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Can solar energy power everyday objects efficiently?
Even though they've come down in price, solar panels are still expensive and somewhat inefficient. And then there are cloudy days. Can solar panels ever replace fossil fuels for our everyday needs?
The Biofuel Quiz
play.howstuffworks.com/quiz/biofuel-quiz
What do vegetable oil, corn and salt water have in common? They're all potential fuel sources for our cars. See how much you know about the next generation of biofuels in our Biofuel Quiz.
What Is an Isotope?
science.howstuffworks.com/isotopes.htm
You don't need to be a fan of chemistry to appreciate isotopes. They affect geology and medicine, too.
How Garbage-powered Cars Could Work
auto.howstuffworks.com/fuel-efficiency/biofuels/garbage-powered-car.htm
Garbage-powered cars aren't just science fiction. Read about the ins and outs of garbage-powered cars and running cars on solid waste.
How can the moon give us clean energy?
science.howstuffworks.com/environmental/energy/moon-clean-energy.htm
A few decades ago, the pursuit of clean energy was "green." Now, it's a necessity. Not only is our power consumption propelling the human race toward a hot, watery, lonely end, but clean energy tends also to be renewable.
6 Automotive Parts You Can Easily Recycle
auto.howstuffworks.com/under-the-hood/salvage-used-junkyard-parts/automotive-parts-recycle.htm
Reducing your vehicles carbon footprint is as easy as 1...2...recycle. Learn more about the 6 automotive parts you can easily recycle.
The Geology Behind 5 American Landmarks
science.howstuffworks.com/environmental/earth/geology/geology-american-landmarks.htm
The U.S. is full of exceptional geological formations. HowStuffWorks looks at at five that set the bar high as far as landmarks go.
What is biorefining?
auto.howstuffworks.com/fuel-efficiency/biofuels/biorefining.htm
What is biorefining? Keep reading to learn about biofuel and biorefining.
There Are More Animals That Start With 'X' Than You'd Expect
animals.howstuffworks.com/animal-facts/animals-that-start-with-x.htm
Scientists have developed several methods for grouping different members of the animal kingdom by species or unique characteristics. However, there is arguably no better method for learning fun facts than by listing animal names alphabetically. These are just a few animals that start with X.
10 Unique Careers You Won't Believe Exist
money.howstuffworks.com/10-unique-careers-you-wont-believe-exist.htm
'So, what do you do?' 'I'm a tampon tester.' How's that for cocktail conversation? Let HowStuffWorks help you find your new, unique career.