The International Civil Aviation Organization launched a new carbon offset standard on Thursday governing how much passengers should pay to offset their emissions footprint. The standard immediately came under fire in Europe when an official at Germany’s emissions trading organization said it underestimates the industry’s contribution. The announcement came on World Environment Day at a United Nations environment conference. While it has yet to post it on its web site, ICAO’s new carbon calculator will be located at www.icao.int/ at the bottom of the left hand column.