<http://schema.org/about>
"While Rachel Carson's Silent Spring catalogued the environmental and health impacts of the agricultural spraying of DDT in the US, early studies of the impacts of indoor spraying of DDT in developing nations as a form of malaria"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/indoor-ddt-spraying-unsurprisingly-linked-to-health-hazards.html>