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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Illicit drug use costs the United States approximately $181 billion every year.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.