In Ways of the Bay, Billy's introductory song illustrates how water running off a roof into a drain spout will eventually end up in the local watershed. All of the water from the streets that flows into storm drains or ditches also eventually flows into the closest creek or river. Billy also introduces the concepts of excess algae, runoff, oxygen loss in the water, estuary, brackish water, nutrients, decomposers, and plankton. Billy ends his program by talking about a bay’s airshed, energy conservation, and how we can all help to keep the bay healthy by saving energy and planting trees.