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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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 first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.