A group of advocates and experts warn in a new report that pesticide pollution coming from farms and homes is doing harm to the Chesapeake Bay. The group says all levels of government from Washington to local areas must step up research into the kinds of threats pesticide contamination presents to the bay, and efforts to reduce that pollution must increase. The Maryland Pesticides Network and the Johns Hopkins Center for a Livable Future work together in what is known as the Chesapeake Bay Watershed Project. The report is the result of a two-year study by the project which used public health experts and environmentalists among others to get data.