"Keep America Beautiful"?

?

From September, 1994 (update #22)

MINNEAPOLIS, Minn. - Billboards were used here this summer to educate Minnesotans about aquatic nuisance species, including zebra mussels. The billboards were in various Twin Cities locations May 1 through August 31. The Minnesota Department of Natural Resources and the U.S. Fish and Wildlife Service funded the project. In another Minnesota effort, the National Park Service operated a free rinse station at four boat landings near the St. Croix National Scenic Riverway this summer. Rinse station staff provided boaters with zebra mussel information and showed them how to inspect their boats. In July alone, 321 boats were decontaminated at the stations.

ID: 199409-7.

The Zebra Mussel Update was a 4- to 8-page quarterly national newsletter published by the University of Wisconsin Sea Grant Institute from May 1990 through May 1997. The ZMU documented the spread of the zebra mussel -- an exotic nuisance mussel -- through North America's freshwater environments, especially the Great Lakes, and on efforts to control it.