An airline of fleet size 100 a/c can consume about 3,000,000 tonnes of fuel a year. Imagine how much American Airlines uses with 736 a/c? Last year Airbus produced 378 a/c, 56% of the world airliner production. So about 700 a/c a year worldwide. So that's 2,100,000,000 tonnes potential fuel consumers added every year.
Big numbers. Hmmm...
