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During the 1930s people carried out more physical activities as there was less means of transport and most of the jobs they had also asked for a lot of movement. Because of this they had to eat more food and have a higher intake of energy. In the 1980s cars had been developed and less physical activities were being carried out so naturally the amount of energy needed decraesed as they were burning less.

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Q: Why did peoples energy intake decrease between the 1930s and the 1980s?
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