<http://schema.org/about>
"A ban on super thin plastic bags cut the use of 40 billion bags, reduced plastic bag usage by 66 percent and saved China 1.6 million tons of petroleum, according to recent government estimates, Worldwatch reports."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/as-us-cities-waver-on-plastic-bag-tax-chinas-bag-ban-saved-16-million-tons-of-oil.html>