The cause of pollutions is found in the various egos we have within. Because they are very strong and have access to so much energy, they demand the satisfaction of their desires, which they accomplish in many ways. So, to stop pollutions, it is necessary to find out how they are manipulating the three brains during the day. This information is acquired through self-observation, and then meditation on what we observed.

Can foods play a role? Of course. Many foods convey strong desire-stimulating substances into the mind. One has to see in oneself what foods affect us and how. This is why in traditional settings, beginners eat restricted diets: no stimulants at all.