<http://schema.org/url>
<http://www.sgvtribune.com/environment-and-nature/20140430/air-quality-gains-could-be-eroded-by-drought-climate-change>
<http://www.pasadenastarnews.com/environment-and-nature/20140430/air-quality-gains-could-be-eroded-by-drought-climate-change>