<http://schema.org/alternativeHeadline>
"The new towers collect much more sunlight during the mornings, evenings and all days of the year regardless of clouds or shadows"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/energy/stories/mits-3-d-solar-towers-generate-20-times-the-power>