Michael Symonds at the university of Nottingham,UK,found that first-bron children have more fat than younger ones. As family size decreases, firstbrons account for a greather share of the population. In 1964, british women gave birth to an average of 2.95 children;by 2005 that figure had fallen to 1.79. in the US in 1976, 9.6% of woman in their 40s had only one chile;in 2004 it was 17.4%. this combination of older mothers and more single children could be contributing to the obesity epidemic.
7.Like marrying like
Just as people pair off according to looks, so they do for size. Lean people are more likely to marry lean an d fat more likely to marry fat. On its own, like marrying like cannot account for any increase in obesity. But combined with others- particularly the fact that obesity is partly genetic, and that heavier people have more children-it amplifies the increase form other causes.
1. A)effects of obesity on people’s health
B)the link between lifestyle an obesity
C)New explanations for the obesity epidemic
D)possible ways to combat the obesity epidemic
2. A)gained the least weight
B)were inclined to eat less
C)found their vigor enhanced
D)were less susceptible to illness
3. A)it makes us sleepy
B)it causes sleep loss
C)it increases our appetite
D)it results from lack of sleep
4. A)it makes us stay indoors more
B)it accelerates our metabolic rate
C)it makes us feel more energetic
D)it contributes to our weight gain
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