<http://schema.org/about>
"For the past three years, some 625 facilities in California with emissions exceeding 25,000 tons of greenhouse gas emissions a year have been reporting their annual emissions to CARB."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/climate-change/carb-releases-google-earth-layer-californias-main-greenhouse-gas-sources.html>