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Who Does — and Doesn't — Get Featured on Blue Highway Exit Signs?
auto.howstuffworks.com/tech-transport/who-featured-blue-highway-exit-signs.htm
Not every business can get one of the coveted six spots on your typical 'gas, food lodging' highway sign. Competition can be stiff, so here's how it works.
How Greenhouses Work
home.howstuffworks.com/lawn-garden/professional-landscaping/greenhouse.htm
Reproducing plants out of season gave man a measure of control over nature. The allure of it sparked the imagination and inspired new methods for building structures devoted to plants. So how do greenhouses work?
How Socialism Works
money.howstuffworks.com/socialism.htm
Socialism is an economic system that promotes societal equality. Learn how socialism differs from forms of government like capitalism and communism.