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Can You Get More Than 11 Right on This Tree Knowledge Quiz?
play.howstuffworks.com/quiz/can-you-get-more-right-this-tree-knowledge-quiz
Trees aren't just idle objects in our world. They're living, breathing creatures that add tremendous value to human life, from shade, to lumber, to simple beauty and a lot more. What do you know about trees?
How Does Oil Recycling Work?
auto.howstuffworks.com/under-the-hood/vehicle-maintenance/oil-recycling.htm
How does oil recycling work? Keep reading to learn how to recycle oil and discover the environmental impacts of oil drilling.
If I Plant Trees in My Yard, Will It Offset Global Warming?
home.howstuffworks.com/gardening/garden-design/global-warming-plant-trees.htm
If you plant trees in your yard, will it really help the planet? Find out how much carbon dioxide a tree absorbs and why you should plant trees.
How to Tune Your Own Car for Better Gas Mileage
auto.howstuffworks.com/fuel-efficiency/fuel-economy/maintain-car-greater-mileage.htm
How to tune your own car for better gas mileage. In this article, learn how to tune your care for better gas mileage.
The Biggest Frog in the World (Plus 11 Massive Contenders)
animals.howstuffworks.com/amphibians/biggest-frog-in-the-world.htm
You might think frogs are small, croaky critters, but the biggest frog in the world could surprise you. Some amphibians grow to sizes that rival house pets. In this list, we're leaping into the world of giant frogs, examining the species that top the charts in length and weight.
How the ZeroHouse Works
home.howstuffworks.com/zero-house.htm
The zeroHouse may be costly to build, but the zeroHouse could certainly save you on energy bills. Read more about the zeroHouse.
How Moss Works
home.howstuffworks.com/moss.htm
Money may not grow on trees. But moss does. How does this plant manage to carpet hard surfaces like rocks and sidewalks?
The Echidna Is One of the World's Strangest Mammals
animals.howstuffworks.com/mammals/echidna.htm
From the four-headed male reproductive organ to hosting the world's largest flea and sporting a body covered in spiny hairs, this cute little creature takes the cake for mammalian weirdness.
Why Is Biodiversity Important for Ecosystems?
science.howstuffworks.com/environmental/conservation/issues/biodiversity-important.htm
Biodiversity means rainforests and reefs teeming with species right? There's more to it than that though. Genetic diversity has a big role to play, too. Just ask that cheetah cub.
Tropical Rainforest Guide: How Rainforests Work
science.howstuffworks.com/environmental/conservation/issues/rainforest.htm
Tropical rainforests are the most diverse ecosystems on Earth, and also the oldest. Today, tropical rainforests cover only 6 percent of the Earth's ground surface, but they are home to over half of the planet's plant and animal species.