<http://schema.org/alternativeHeadline>
"Odors and toxins from cigarettes can be found for months after smokers move out of a residence. Surprisingly, plants may be your best option for cleaning that unhealthy air."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/healthy-spaces/stories/cleaning-cigarette-smells-with-plants>