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How Zero Population Growth Works
people.howstuffworks.com/zero-population-growth.htm
The goal of zero population growth is to reach a sustainable global birth rate. Explore how zero population growth works and if it is possible.
Synchronous Fireflies Will Perform Spring Smoky Mountain Light Show
animals.howstuffworks.com/insects/synchronized-fireflies-perform-light-show-like-no-other.htm
Every year, synchronized fireflies light up in one, huge choreographed courtship display in a few spots around the world.
How the Sierra Club Works
science.howstuffworks.com/environmental/conservation/issues/sierra-club.htm
The Sierra Club protects the environment by lobbying for environmental preservation. Learn more about the Sierra Club conservation efforts.
What's the Earth's biggest threat to biodiversity?
science.howstuffworks.com/environmental/conservation/issues/biggest-threat-to-biodiversity.htm
The biggest threat to biodiversity on Earth is explained in this article from HowStuffWorks. Learn about the biggest threat to biodiversity.
What Happens When a Keystone Species Goes Extinct?
science.howstuffworks.com/environmental/conservation/issues/keystone-species-extinct.htm
Keystone species in an ecosystem function much like a keystone in an arch. Without them the structure collapses. Learn about keystone species.
Can You Identify All These Road Signs?
play.howstuffworks.com/quiz/can-you-identify-all-these-road-signs
Are you prone to road rage when you see a car ignoring the rules of the road? It's time to see if you stand up to your own criticism. If you know what all of these road signs are for, you're an expert driver.
10 Essential Supreme Court Cases of Ruth Bader Ginsburg
people.howstuffworks.com/10-essential-supreme-court-cases-ruth-bader-ginsburg.htm
Ruth Bader Ginsburg was a huge force on the Supreme Court. HowStuffWorks looks at the mark she left in her 27 years on the highest court.
Environmental Activities
lifestyle.howstuffworks.com/crafts/animal-crafts/environmental-activities.htm
Dig in dirt or through books to educate yourself on the environment. Learn more about environmental activities and kids crafts.
Wildfires Can Form Monstrous Pyrocumulonimbus Clouds
science.howstuffworks.com/nature/natural-disasters/wildfire-thunderclouds.htm
These massive clouds form when wildfires give off heat. HowStuffWorks looks at how climate change is making conditions favorable for more to form.
How Caterpillars Work
animals.howstuffworks.com/insects/caterpillar.htm
Caterpillars' lives are all about eating. Learn why caterpillars eat everything, how they grow into a butterfly or moth and more.