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Your search for "greenhouses" returned 376 results
10 'Richest' Countries in the World (With a Huge Caveat)
money.howstuffworks.com/richest-country-in-the-world.htm
Economists have historically used GDP per capita to determine the richest country in the world, but that's misleading when you consider the tax havens effect.
How Aluminum Works
science.howstuffworks.com/aluminum.htm
Aluminum is used in many products, from pots and pans to light bulbs and power lines. Learn how aluminum went undiscovered for so long.
How Power Grids Work
science.howstuffworks.com/environmental/energy/power.htm
Electrical power is a little bit like the air you breathe: You don't really think about it until it is missing. There are good reasons the power grid distribution system works the way it does, though it can lead to some big problems.
Where Have All the Water Fountains Gone? Here's Why We Should Bring Them Back
science.howstuffworks.com/engineering/civil/water-fountains.htm
Drinking fountains have faced a challenge from bottled water, but they seem to be making a comeback. By the way, we throw away over 60 million PET water bottles every day in the U.S. alone.
10 Things You Need to Know About Wood Pellet Fireplaces
To save money, many people are considering alternative heat sources, and wood pellet fireplaces are one possible solution to rising energy costs. But what do you need to know before you head out to buy one of these energy savers?
Benefits of Canola Oil
health.howstuffworks.com/wellness/food-nutrition/facts/benefits-of-canola-oil.htm
There are several benefits of canola oil. Take a look at the nutritional information and benefits of canola oil.
Can You Answer All of These Questions a Farmer Should Know?
play.howstuffworks.com/quiz/can-you-answer-all-of-these-questions-a-farmer-should-know
Old McDonald had a farm, and it was a complex operation that required plenty of mechanical and scientific know-how to run. Do you have what it takes to answer questions about this ancient profession?
79 Riddles for Kids (With Answers)
entertainment.howstuffworks.com/leisure/brain-games/riddles-for-kids.htm
Riddles for kids are more than just a fun way to pass the time; they're a great tool for building critical thinking skills. By solving riddles and word puzzles, children learn to think creatively, explore words with multiple meanings and approach problems from different angles.
Space Trivia
play.howstuffworks.com/quiz/space-trivia
If stargazing is your jam and you know that you could be the next Neil deGrasse Tyson, this celestial trivia quiz will rock your whole galaxy! Are you ready to shoot for the stars?
How Wetlands Work
science.howstuffworks.com/environmental/green-science/wetland.htm
Wetlands act like sponges, soaking up extra water during floods. They filter water as it runs to our rivers and streams. Find out what else wetlands do.