<http://schema.org/about>
"Pollution has long been known to bear various impacts on animals' reproductive behavior. But rarely is the effect so pronounced as what scientists have observed happening to bird populations that"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/pollution-making-male-birds-mate-with-each-other-scientists.html>