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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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Your heart beats over 36 million times a year.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are approximately 3 million unintended pregnancies in the United States each year.