| Carbon Dioxide Emissions |
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| The amount of CO2 emitted by our aircraft in fiscal 1998 was about 2.13 million
tons (in terms of carbon converted amounts). The amount of fuel consumed is forecast
to increase in future with the growth of passenger traffic.
Currently there is no suitable alternative to fossil fuel. Airlines must use
fuel effectively, that is, carry passengers efficiently with less energy. The
Figure here shows the change in amounts of CO2 emission for each Available Seat
Kilometer (ASK). The figure for ASK increases greatly as demand in passenger traffic
increases, while the amount of C02 emission per ASK tends to decrease. |
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| Fuel Efficiency |
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| Change in fuel efficiency of ANA's fleet (fuel consumption per ASK) is shown
in the figure below (Overall, domestic,and international).
While the amount of fuel consumed increases with ASK expansion too, it is understood
that the fuel efficiency improves by several percent each year.
Wide fluctuations are evident for our international service due to the addition
of new routes and so on. However, remarkable decreases can be seen for our domestic
service. |
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| Introduction of New Aircraft |
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| The most effective way to reduce CO2 emissions, that is, to reduce fuel consumption,
is to introduce the latest, most fuel-efficient aircraft. Using the latest engine
technology, these aircraft feature efficient engines with high by-pass ratios;
improved aerodynamics (wing shape, etc.) that decrease air resistance; and reduced
weight through the use of composite materials.
The next figure shows how C02 emissions have been reduced through the introduction
of new aircraft. Models are shown from left to right in the order in which they
were introduced. |
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| Fuel Consumption by Aircraft Type (1999) |
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| This figure indicates fuel consumption in liters by aircraft type per 100
Available Seat Kilometers.
The B777-300 is the most fuel-efficient aircraft on ANA's domestic routes.
The B777-200 and B767-300ER are the most fuel-efficient aircraft on our international
routes. |
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