<http://schema.org/about>
"With the European Union's plan to include aviation in its emission trading scheme just two years away, there's some more movement on slowing the growing carbon footprint of the airline industry. At the annual"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/global-aviation-industry-aims-to-cap-emissions-in-2020-strengthens-energy-efficiency-target.html>