Scientists fear rising energy bills may lead to an increase in obesity （肥胖） after discovering a link between poorly-heated homes and higher body -fat．
Researchers from the University of Stirling’s Behavioural Science Centre set out to explore claims that warm indoor temperatures have contributed to rising obesity levels in winter．Instead, the team found that people who live in well-heated homes are more likely to have low body mass index （体重指数） levels while those who keep their heating turned down or off tend to be heavier．
Dr Michael Daly, behavioral scientist and senior lecturer, said: "We set out to investigate the scientific claims that cooler indoor temperatures help us maintain a healthy weight by pushing our bodies to use up more energy. In fact, the research suggests people may eat less and burn more energy when in a warmer indoor environment．
The 13-year study, published in the journal Obesity, involved more than 100,000 adults across England．
Researchers found reduced weight levels among people living in homes heated to above 23°C（73F）, which involved about 15,000 of the households studied．
Dr Daly said: "As national gas bills continue to rise faster than the rate of inflation, this research suggests the obesity could worsen where heating is turned down below comfortable levels or off for long periods to cut costs．"
This is not just about people who live in well-heated homes being in the financial position to afford more expensive low-calorie foods, exercise classes and sporting activities, and therefore finding it easier to maintain a low BMI level．The study took age, sex, social class and other factors into account．
"The comfortable temperature of 20°C -23°C is where we feel comfortable in our clothes and are neither hot nor cold．At temperatures above this, we use more energy and we eat less because our appetite is affected．"
13. The findings of the research can be described as ___．
A．horrible B．surprising
C．funny D．encouraging
14. According to the passage, with rising gas bills, people may turn down or off their heating to______.
A．stay in shape B．maintain a low BMI level
C．save money D．avoid eating more
15. Which of the following can be the best title for the passage?
A．Obesity links to poorly-heated homes
B．Well-heated home's contribute to obesity
C．Obesity--- A weighty problem in England
D．Rising energy bills help maintain a healthy weight