The use of sodium and calcium chlorides for the removal or snow and ice from the highway has, while alleviating one problem, created another in the damage to adjacent vegetation. several New England states are concerned over the loss of sugar maples and other roadside trees which, they suspect, are killed by salt runoff. Numerous public agencies including the National Park Service, State Highway Departments and municipalities are concerned with the loss of, or damage to, both herbaceous and woody vegetation adjacent to roadways, walks or parking lots where salt is used for deicing purposes.