<http://schema.org/about>
"World Environment Day is coming (mark your calendars for June 5) and to support it this year, Honda will be giving away a green gift with each of their cars sold in June. The gift pack will include a carbon emission offset certificate for the month,"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/cars/hondas-green-gifts-include-co2-offsets.html>