In the past 20 years, the average life expectancy in most nations has risen by a couple

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In the past 20 years, the average life expectancy in most nations has risen by a couple of years. So has the “healthy life expectancy,” which is a measure of how long people remain in good health. Are the two necessarily related? How so?

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Conceptual Physical Science

ISBN: 978-0134060491

6th edition

Authors: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt

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