Motor powered boats used to collect, retrieve, or remove aquatic vegetation, algae, refuse, oil and other water polluting materials; motor powered boats with integral aquatic weed cutters and retrievers, used to cut and collect aquatic vegetation and algae; Motor powered boats with removably attachable cutters used to cut aquatic vegetation and/or conveyors used to retrieve or remove aquatic vegetation, algae, refuse, oil and other water polluting materials from bodies of water, and/or skimme...