A new study suggests that the cause of rampant obesity in America is cheap, tempting food that is convenient to eat, NBC News reported. "If we want to solve the obesity problem, we have to figure out what has changed for everybody," said Roland Sturm, a Pardee RAND Graduate School professor who led the study. "And the thing that pops out is our food environment." Strum suggests that researchers have been misguided in thinking race, ethnicity or socio-economic status leads to obesity, because most people are gaining weight at about the same rate. Marion Nestle, a professor at New York University, criticized the study for only blaming cheap, fatty food for America's obesity problem.