Back in the days of churning your own butter, food prep took up the same hours as a full-time job – 44 hours per week on average. In the US, that time has been cut down to one hour per week. Even in India, with the world's highest food prep time, women spend 31 fewer hours per week than US women in 1900. The market's innovation made this possible, but there's still progress to be made.
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