It is also important to understand that the problem is larger than the harmful environmental chemicals we have all learned to fear (lead, mercury, other heavy metals, etc.). It also includes the much more common problems of food additives, food dyes, envronmental hormones, pesticides, herbicides, fungicides, prescription drugs, and petrochemicals of all sorts. In other words, the pollutants in the air, water, and food that we ingest every day.