<http://schema.org/alternativeHeadline>
"Lightweight, inexpensive battery packs are making electric propulsion practical, for everything from yachts and launches to pontoon boats. (Planes, too, but that's another story.)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/transportation/blogs/forget-electric-cars-its-time-for-electric-boats>