> People were also more likely to litter if they were in an area that already had trash on the ground. A person at a highway rest stop cluttered with cigarette

> People were also more likely to litter if they were in an area that already had trash on the ground. A person at a highway rest stop cluttered with cigarette butts and food wrappers was more apt to litter than someone at a manicured park. I wonder if this controls for the other confounding factors that will affect rates?