Come, now....
It isn't that cut & dry. They were wondering if it was primarily due to overeating or being lazy.
So basically: Americans have increased their food intake in a greater proportion than they have reduced their energy expenditure.
But I do agree this is all rather elementary.
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Knowing that death is certain and that the time of death is uncertain, what's the most important thing?
—Bhikkhuni Pema Chödrön
Humankind cannot bear very much reality.
—From "Burnt Norton," Four Quartets (1936), T. S. Eliot
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