The list of ills attributable to obesity keeps growing: Last week, obese people were accused of causing global warming. This 1 comes from Sheldon Jacobson of the University of Illinois, US, and a doctoral student, Laura McLay. Their study 2 how much extra gasoline is needed to haul fat Americans around. The answer, they say, is a billion gallons of gas per year. It 3 an extra 11 million tons of carbon dioxide. There have been 4 for taxes on junk food in recent years. US economist Martin Schmidt suggests a tax on fast food 5 to people's cars. 'We tax cigarettes partly because of their health cost,' Schmidt said. 'Similarly, leading a lazy lifestyle will end 6 costing taxpayers more.' US political scientist Eric Oliver said his first 7 was to laugh at these gas and fast food arguments. But such 8 are getting attention. At the US Obesity Society's annual meeting, one person 9 obesity with car accident deaths, and another correlated obesity with suicides. No one asked 10 there was really a cause-and-effect relationship. 'The funny thing was that everyone took it 11 ' Oliver said. In a 1960s study, children were 12 drawings of children with disabilities and without them, and a drawing of an obese child. They were asked 13 they would want for a friend. The obese child was picked 14 . Three researchers recently repeated the study 15 college students. Once again, 16 no one, not even obese people, liked the obese person. But, researchers say, getting 17 is not like quitting smoking. People struggle to stop smoking, and, in the end, many succeed. Obesity is 18 . Science has shown that they have 19 personal control over their weight. Genes also 20 a part.