<http://schema.org/alternativeHeadline>
"Tired of trying to motivate others to live greener lives? Four contests rely on good old-fashioned self-interest to get you proselytizing eco-behavior."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/lifestyle/responsible-living/blogs/4-ways-to-go-green-to-win-green>