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How much vitamin D do you get from the sun?

health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/how-much-vitamin-d-from-sun.htm

Getting vitamin D from the sun is one of the best ways to get your requirements. But exactly how much vitamin D do you get from the sun? Find out.

How Xeriscaping Works

home.howstuffworks.com/lawn-garden/professional-landscaping/xeriscaping.htm

Xeriscaping can help keep a lush, green landscape from succumbing to drought and turning into a yellow wasteland. Learn about Xeriscaping.

How Low-flow Toilets Flush Your Waste Without Wasting Water

home.howstuffworks.com/low-flow-toilet.htm

Low-flow toilets have improved significantly since they first came onto the market in the 1990s. Not only can they save tons of water, they also now can flush your waste with as little as a gallon of water.

How Engine Brakes Work

auto.howstuffworks.com/auto-parts/brakes/brake-types/engine-brakes.htm

Engine brakes are controversial because of their noise-levels. Check out HowStuffWorks for a great explanation on how engine brakes work.

How can recycling impact a community?

science.howstuffworks.com/environmental/green-science/recycling-impact-community.htm

Lots of people consider recycling to be kind of a no-brainer, something we all should do. It's good for the environment, it re-uses materials rather than creates new ones, it reduces landfills - the list goes on and on.

How the Cabinet Works

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What is the Cabinet, and how do its members assist the president? Learn about the people involved in the U.S. government's Cabinet.

How does Dursban work?

home.howstuffworks.com/question440.htm

How does the pesticide Dursban work? Does it have the same effect on humans that it has on insects?

Ultimate Guide to Organic Clothing

lifestyle.howstuffworks.com/crafts/wearable/organic-clothing.htm

Organic clothing is made of all-natural, non-synthetic materials. Get tips on buying organic clothing, explore the different organic fabrics and more.

How Acid Rain Works

science.howstuffworks.com/nature/climate-weather/atmospheric/acid-rain.htm

Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides from power plants, cars and factories. Find out how acid rain is produced.

How the Ice Age Worked

history.howstuffworks.com/historical-events/ice-age.htm

An ice age is a period of cooling, marked by the presence of glaciers and ice sheets. Learn how an ice age works and if we're in an ice age right now.

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