Pollution is a continuous problem in our society, and the pollution of such things as fast food packaging can have consequences on our environment. An example of these effects is pollution leading to bioaccumulation; which is caused when chemicals from fast food packaging get absorbed into the ground.
Eduardo leaves 1/3 of the samples dirty. He divides the other samples into two groups. He cleans each group with a different vacuum. He puts the samples in a random order, then asks the panelists to rate how clean each sample is.
