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How long has the metric system been legal in the United States?

April 26, 2017Legal metric system united states

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How long has the metric system been legal in the United States?

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The metric system has been taught in the schools since the 70’s, but it is still not the “legal” system in the US as we still measure gas and milk by the gallon, not by the liter, land is in acres, not by the hectaire. Scientists use the metric system so that results are compatible with results from Europe.