So far, the standardized approach, which was launched in June 2012 and is spearheaded by the International Tourism Partnership and the World Travel and Tourism Council, is geared toward companies that book conferences and corporate travel.

BBC: Can hotels be truly carbon neutral?

The World Travel and Tourism Council reports that travel and tourism directly supports 99 million jobs around the world 3.4% of global employment in 2011.

BBC: Saving the global economy one business trip at a time

The World Travel and Tourism Council, a trade body, talked this week of a 30% drop in global travel-industry revenues, before swiftly (and inexplicably) switching to a much less pessimistic forecast: a fall over the next 12 months of 10-20% in America, and less in Europe and Asia.

ECONOMIST: Travel industry: A business in search of customers | The

"The U.S. was hit on its own territory, and furthermore, the impact was done by civilian aircraft, which most probably will create a psychological effect that is much bigger than the Gulf War, " said Jean-Claude Baumgarten, CEO of the World Travel and Tourism Council.

CNN: World tourism industry fears extended slump

Think about this the next time you submit an expense report: if business travel were cut by 25% for two consecutive years, global GDP would decline 5%, resulting in 30 million fewer jobs worldwide, according to a new report from the World Travel and Tourism Council ( WTTC).

BBC: Business travel is big business