The global efforts to reduce carbon emissions are marked by a conspicuous omission: the aviation and shipping industries. These two industries contribute 6% of all man-made CO2 emissions, but have so far managed to avoid international control. And not only are they major sources of carbon emissions, their contributions are growing three times faster than overall global CO2 emissions.
In March, United Airlines began using a new biofuel for flights between Los Angeles and San Francisco. The fuel is a renewable product called Honeywell Green Jet Fuel that can replace up to half of the petroleum jet fuel used in flight without any changes to the aircraft technology and it meets all current jet fuel specifications.
