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How Much Water Is on Earth?
science.howstuffworks.com/environmental/earth/geophysics/question157.htm
Water is one of the most abundant substances on the planet. About 70 percent of our planet is covered by oceans, but just how much water is there on Earth?
How Tankless Water Heaters Work
home.howstuffworks.com/tankless-water-heater.htm
The green movement is bringing tankless water heaters to the forefront of the appliance market. They last longer, don't take up much space and give you as much hot water as you want. Is there a catch?
Mexico's Giant Crystal Cave Is Beautiful But Deadly
science.howstuffworks.com/environmental/earth/geology/mexico-giant-crystal-cave.htm
Massive gypsum crystals were discovered beneath Mexico's Sierra de Naica Mountain in very inhospitable environs — to humans anyway.
How Water Works
science.howstuffworks.com/environmental/earth/geophysics/h2o.htm
Water is the most essential element to life on Earth. Learn about water, the properties of water and find out how the water cycle operates.
How dangerous is sewage?
home.howstuffworks.com/home-improvement/plumbing/dangerous-sewage.htm
Sewage that is left untreated can have a deadly impact on the environment. Learn how dangerous sewage is in this article.
Top 5 Things That Go Wrong in Too-Fast Construction
home.howstuffworks.com/home-improvement/construction/planning/5-things-too-fast-construction.htm
There are a lot of problems that can happen with too fast construction. Check out 5 things that go wrong in too-fast construction.
How long can a germ live in a room?
health.howstuffworks.com/diseases-conditions/infectious/question235.htm
How long can a germ live in a room? My son had a friend over, and the friend was coughing all over the house. How long can his germs infect people?
Diesel Fuel Storage Regulations
auto.howstuffworks.com/diesel-fuel-storage-regulation.htm
How much do you know about Diesel Fuel Storage Regulations? Keep reading to learn about fuel storage regulations and keep it safe and legal.
Is your vinyl siding killing you?
home.howstuffworks.com/home-improvement/repair/vinyl-siding-lethal.htm
The vinyl siding on your house could be dangerous to your health because of chemicals in the siding. Learn more about the dangers of vinyl siding.
The Farming Quiz
play.howstuffworks.com/quiz/the-farming-quiz
Without farmers, the world’s 7 billion people would not have enough food to eat. Modern farming uses high-tech tools and processes to maximize crop yields, from Japanese rice to American corn. What do you really know about farming?