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How Acid Rain Works

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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 Acoustic Levitation Works

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The idea that something so intangible as acoustic levitation can lift objects may seem unbelievable, but it's a real phenomenon.

How Addiction Works: Exploring Substance Use Disorders

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Addiction to substances, such as drugs and alcohol, have ruined the lives of people all over the world. Read about current views and ideas on addiction.

How Adhesive Tape Works

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In 1925, after an auto paint job gone wrong, a young research assistant was struck by the idea for adhesive tape. But how does tape actually stick, and how are we able to peel it off a roll?

How Aerobatics Works

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Aerobatics in an airplane is an incredible display of skill and nerves. Learn about the history of aerobatics in this article from HowStuffWorks.

How Aerogels Work

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Aerogels are incredible materials that could have dozens of uses from insulation to oil spill cleanup. Learn about aerogels in this article.

How Aerosol Cans Work

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They dispense everything from hairspray to cleaning products to whipped cream. Without them, you'd be doing a whole lot of pumping.

How Agent Orange Worked

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UAT 0- Agent Orange was a potent herbicide and defoliant used in large quantities during the Vietnam War. Learn about Agent Orange and its terrible legacy.

How Air Taxis Will Work

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Air taxis could make a trip to the beach or a visit with friends and relatives go from taking six hours on the highway to a quick, no-hassles plane ride. Find out how the air-taxi system will operate.

How Air Traffic Control Works

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There are about 5,000 planes in U.S. airspace every hour. How do these aircraft keep from colliding with each other? Learn about the intricate system that guides a plane from takeoff to landing.